Datasheet

ManualsBrandsMURATA POWER SOLUTIONS ManualsPSU ComponentsDC/DC converter (print) 50 A 165 W No. of outputs: 1 x

PART NUMBER STRUCTURE

FEATURES



Small package: SMD/TH: 30.85 x 20.0 x 8.2 mm

(1.215 x 0.787 x 0.323 in); SIP: 33.0 x 7.6 x 18.1 mm

(1.30 x 0.30 x 0.713 in)



0.6 V - 3.3 V output voltage range



High efﬁ ciency, typ. 97.2% at 5Vin, 3.3Vout half

load



Conﬁ guration and monitoring via PMBus™



Adaptive compensation of PWM control loop &

fast loop transient response



Synchonization & phase spreading



Current sharing, voltage tracking & voltage

margining



Voltage setting via pin-strap or PMBus™



MTBF 14.2 Mh



Non-Linear Response for reduction of decou-

pling capacitor



Remote control & power good



Output short-circuit, output over voltage, & over

temperature protection



Certiﬁ ed to UL/IEC 60950-1

Typical units

PRODUCT OVERVIEW

The OKDx-T/50-W12 series are high efﬁ -

ciency, digital point-of-Load (PoL) DC-DC

power converters capable of delivering

50A/165W. Available in three different pack-

age formats, through-hole, single-in-line,

and surface mount, these converters have a

typical efﬁ ciency of 97.2%. PMBus™ compat-

ibility allows monitoring and conﬁ guration of

critical system-level performance require-

ments. Apart from standard PoL performance

and safety features like OVP, OCP, OTP, and

UVLO, these digital converters have advanced

features: digital current sharing (full power,

no derating), non-linear transient response,

optimized dead time control, synchronization,

and phase spreading. These converters are

ideal for use in telecommunications, network-

ing, and distributed power applications.

Power Management via PMBus™



Conﬁ gurable soft-start/stop



Conﬁ gurable output voltage (Vout) and voltage

margins (Margin low and Margin high)



Conﬁ gurable protection limits for OVP, input over

voltage, input under voltage, over current, on/off,

and temperature



Status monitor Vout, Iout, Vin, Temp, Power

good, and On/Off

Applications



Distributed power architectures



Intermediate bus voltage applications



Servers and storage applications



Network equipment

Trimmable Output

Voltage Range

0.6 - 3.3Vdc

- T

Y = Surface Mount

H = Horizontal Mount Through-Hole

X = SIP

Digital Non-isolated PoL

OKD C-

RoHS Hazardous

Substance Compliance

C = RoHS-6 (does not claim EU RoHS exemption

7b – lead in solder)

Maximum Rated Output

Current in Amps

/ 50

Input Voltage Range

4.5-14Vdc

W12-

Software Conﬁ guration Digits

(001 is positive turn-on logic)

(002 is negative turn-on logic)*

xxx-

ypical unit

Long pin length (5.5mm)

*Special quantity order is required;

contact Murata Power Solutions for

MOQ and lead times.

OKDx-T/50-W12-C

50A Digital PoL DC-DC Converter Series

MDC_OKDx-T/50-W12-C.A04 Page 1 of 41

www.murata-ps.com

www.murata-ps.com/support

Summary of content (41 pages)

PAGE 1
OKDx-T/50-W12-C www.murata-ps.com 50A Digital PoL DC-DC Converter Series Typical units FEATURES  Small package: SMD/TH: 30.85 x 20.0 x 8.2 mm (1.215 x 0.787 x 0.323 in); SIP: 33.0 x 7.6 x 18.1 mm (1.30 x 0.30 x 0.713 in) PRODUCT OVERVIEW  Synchonization & phase spreading The OKDx-T/50-W12 series are high efﬁciency, digital point-of-Load (PoL) DC-DC power converters capable of delivering 50A/165W.
PAGE 2
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series ORDERING GUIDE Model Number OKDY-T/50-W12-001-C OKDH-T/50-W12-001-C OKDX-T/50-W12-001-C OKDX-T/50-W12E-001-C OKDH-T/50-W12-002-C OKDX-T/50-W12-002-C Output 0.6-3.
PAGE 3
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Electrical Speciﬁcations, OKDY-T/50-W12-C and OKDH-T/50-W12-C TP1 = -30 to +95°C, VIN = 4.5 to 14 V, VIN > VOUT + 1.0 V Typical values given at: TP1 = +25 °C, VIN = 12.0 V, max IOUT, unless otherwise speciﬁed under Conditions. Default conﬁguration ﬁle, 190 10-CDA 102 0206/001. External CIN = 470 μF/10 mΩ, COUT = 470 μF/10 mΩ. See Operating Information section for selection of capacitor types. Sense pins are connected to the output pins.
PAGE 4
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Characteristics Turned off with CTRL-pin PCTRL Input standby power Ci Co Internal input capacitance Internal output capacitance Total external output capacitance ESR range of capacitors (per single capacitor) COUT Vtr1 ttr1 fs Load transient peak voltage deviation (L to H/H to L) Load step 25-75-25% of max IO Load transient recovery time, Note 5 (L to H/H to L) Load step 25-75-25% of max IO Default conﬁguration di/dt = 2 A/μs CO = 470 μF (mini
PAGE 5
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Characteristics Over Temperature Protection, OTP at P2 See Note 8 VIL VIH IIL VOL VOH IOL IOH tset thold tfree Cp Conditions OTP threshold OTP threshold range OTP hysteresis OTP hysteresis range Fault response Logic input low threshold Logic input high threshold Logic input low sink current Logic output low signal level Logic output high signal level Logic output low sink current Logic output high source current Setup time, SMBus Hold time, SMBus Bus
PAGE 6
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Characteristics Efficiency and Power Dissipation Efficiency vs. Output Current, VI = 5 V Power Dissipation vs. Output Current, VI = 5 V [%] [W] 100 12 95 10 8 90 0.6 V 1.0 V 85 80 75 0 0 1 0 2 0 3 0 4 0.6 V 6 1.0 V 1.8 V 4 1.8 V 3.3 V 2 3.3 V 0 50 [A] 0 0 1 0 2 0 3 0 4 50 [A] Efficiency vs. load current and output voltage: TP1 = +25 °C, VI = 5 V, fsw = 320 kHz, CO = 470 μF/10 m. Dissipated power vs.
PAGE 7
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Characteristics Load Transient Load Transient vs. External Capacitance, VO = 1.0 V [mV] 500 Universal PID, No NLR Load Transient vs. External Capacitance, VO = 3.3 V [mV] 500 Universal PID, No NLR 400 DLC, No NLR 400 300 Universal PID, Default NLR 300 Universal PID, Default NLR 200 DLC, Default NLR 200 DLC, Default NLR 100 Universal PID, Opt. NLR 100 Universal PID, Opt. NLR DLC, Opt. NLR 0 0 1 2 3 4 DLC, Opt.
PAGE 8
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Characteristics Output Current Characteristic Output Current Derating, VO = 0.6 V Output Current Derating, VO = 1.0 V [A] [A] 50 50 3.0 m/s 40 2.0 m/s 3.0 m/s 40 2.0 m/s 30 1.0 m/s 30 1.0 m/s 20 0.5 m/s 20 0.5 m/s Nat. Conv. 10 0 Nat. Conv. 10 0 20 40 60 80 100 120 [°C] 20 40 60 80 100 120 [°C] Available load current vs. ambient air temperature and airflow at VO = 0.6 V, VI = 12 V.
PAGE 9
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Characteristics Output Voltage Output Ripple & Noise, VO = 1.0 V Output Ripple & Noise, VO = 3.3 V Output voltage ripple at: TP1 = +25 °C, Trace: output voltage (10 mV/div.). Time scale: (2 μs/div.). VI = 12 V, CO = 470 μF/10 m IO = 50 A Output voltage ripple at: TP1 = +25 °C, Trace: output voltage (10 mV/div.). VI = 12 V, CO = 470 μF/10 m Time scale: (2 μs/div.). IO = 50 A Output Ripple vs. Input Voltage Output Ripple vs.
PAGE 10
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Characteristics Start-up and shut-down Start-up by input source Start-up enabled by connecting VI at: TP1 = +25 °C, VI = 12 V, VO = 1.0 V CO = 470 μF/10 m, IO = 50 A Shut-down by input source Top trace: output voltage (0.5 V/div.). Bottom trace: input voltage (5 V/div.). Time scale: (20 ms/div.). Start-up by CTRL signal Start-up by enabling CTRL signal at: TP1 = +25 °C, VI = 12 V, VO = 1.
PAGE 11
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Electrical Speciﬁcations, OKDX-T/50-W12-C TP1 = -30 to +95 °C, VI = 4.5 to 14 V, VI > VO + 1.0 V Typical values given at: TP1 = +25 °C, VI = 12.0 V, max IO, unless otherwise speciﬁed under Conditions. Default conﬁguration ﬁle, 190 10-CDA 102 0259/001. External CIN = 470 μF/10 mΩ, COUT = 470 μF/10 mΩ. See Operating Information section for selection of capacitor types. Sense pins are connected to the output pins.
PAGE 12
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Characteristics Co Internal output capacitance Total external output capacitance COUT ESR range of capacitors (per single capacitor) Vtr1 ttr1 fs Load transient peak voltage deviation (L to H/H to L) Load step 25-75-25% of max IO Default conﬁguration di/dt = 2 A/μs CO = 470 μF (minimum external capacitance) see Note 12 Load transient recovery time, Note 5 (L to H/H to L) Load step 25-75-25% of max IO Default conﬁguration di/dt = 2 A/μs CO = 470 μ
PAGE 13
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Characteristics Over Temperature Protection, OTP at P2 See Note 8 VIL VIH IIL VOL VOH IOL IOH tset thold tfree Cp Conditions OTP threshold OTP threshold range OTP hysteresis OTP hysteresis range Fault response Logic input low threshold Logic input high threshold Logic input low sink current Logic output low signal level Logic output high signal level Logic output low sink current Logic output high source current Setup time, SMBus Hold time, SMBus Bus
PAGE 14
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Characteristics Efficiency and Power Dissipation Efficiency vs. Output Current, VI = 5 V Power Dissipation vs. Output Current, VI = 5 V [%] [W] 100 12 10 95 8 90 0.6 V 1.0 V 85 80 75 0 10 20 30 40 0.6 V 6 1.0 V 1.8 V 4 1.8 V 3.3 V 2 3.3 V 0 50 [A] 0 10 20 30 40 50 [A] Efficiency vs. load current and output voltage: TP1 = +25 °C, VI = 5 V, fsw = 320 kHz, CO = 470 μF/10 m. Dissipated power vs.
PAGE 15
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Characteristics Load Transient Load Transient vs. External Capacitance, VO = 1.0 V [mV] 500 400 Universal PID, No NLR Load Transient vs. External Capacitance, VO = 3.3 V [mV] 500 Universal PID, No NLR DLC, No NLR 400 DLC, No NLR 300 Universal PID, Default NLR 300 Universal PID, Default NLR 200 DLC, Default NLR 200 DLC, Default NLR 100 Universal PID, Opt. NLR 100 Universal PID, Opt. NLR DLC, Opt.
PAGE 16
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Characteristics Output Current Characteristic Output Current Derating, VO = 0.6 V Output Current Derating, VO = 1.0 V [A] [A] 50 50 3.0 m/s 3.0 m/s 40 2.0 m/s 40 2.0 m/s 30 1.0 m/s 30 1.0 m/s 20 0.5 m/s 20 0.5 m/s Nat. Conv. 10 0 Nat. Conv. 10 0 20 40 60 80 100 120 [°C] 20 40 60 80 100 120 [°C] Available load current vs. ambient air temperature and airflow at VO = 0.6 V, VI = 12 V.
PAGE 17
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Characteristics Output Voltage Output Ripple & Noise, VO = 1.0 V Output Ripple & Noise, VO = 3.3 V Output voltage ripple at: TP1 = +25 °C, Trace: output voltage (10 mV/div.). Time scale: (2 μs/div.). VI = 12 V, CO = 470 μF/10 m IO = 50 A Output voltage ripple at: TP1 = +25 °C, Trace: output voltage (10 mV/div.). Time scale: (2 μs/div.). VI = 12 V, CO = 470 μF/10 m IO = 50 A Output Ripple vs. Input Voltage Output Ripple vs.
PAGE 18
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Characteristics Start-up and shut-down Start-up by input source Start-up enabled by connecting VI at: TP1 = +25 °C, VI = 12 V, VO = 1.0 V CO = 470 μF/10 m, IO = 50 A Shut-down by input source Top trace: output voltage (0.5 V/div.). Bottom trace: input voltage (5 V/div.). Time scale: (20 ms/div.). Start-up by CTRL signal Start-up by enabling CTRL signal at: TP1 = +25 °C, VI = 12 V, VO = 1.
PAGE 19
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Conducted EMI Input terminal value (typical for default conﬁguration) Output Ripple and Noise Output ripple and noise is measured according to ﬁgure below. A 50 mm conductor works as a small inductor forming together with the two capacitors as a damped ﬁlter. 50 mm conductor Vout Tantalum Capacitor Output 10 μ F Capacitor 470 μ F/10 m Ω +S –S GND Ceramic Capacitor 0.
PAGE 20
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Input Under Voltage Lockout, UVLO The product monitors the input voltage and will turn-on and turn-off at configured levels. The default turn-on input voltage level setting is 4.20 V, whereas the corresponding turn-off input voltage level is 3.85 V. Hence, the default hys teresis between turn-on and turn-off input voltage is 0.35 V. Once an input turn-off condition occurs, the device can respond in a number of ways as follows: 1.
PAGE 21
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series ª ESR º C min N t« . » and C t ESR N max » « x If the ESR value is ESR ESR min the capacitance value should be ESRmin . ESR For a total capacitance outside the above stated range or capacitors that do not follow the stated above requirements above a re-design of the control loop parameters will be necessary for robust dynamic operation and stability.
PAGE 22
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series A = 3289.56, B = -6248.12, C = 2964.06 Write 0x7CB941FDC3417CCD99 to PID_TAPS register and write command STORE_USER_ALL Note that if DLC is enabled, for best results VI must be stable before DLC algorithm begins. Load Transient Response Optimization The product incorporates a Non-Linear transient Response, NLR, loop that decreases the response time and the output voltage deviation during a load transient.
PAGE 23
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Output Voltage Adjust Limitation using PMBus In addition to the maximum output voltage limitation by the pin-strap resistor RSET, there is also a limitation in how much the output voltage can be increased while the output is enabled. If output is disabled then RSET resistor is the only limitation. falls below 85% of the nominal voltage. These limits may be changed via the PMBus interface.
PAGE 24
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series aligning the output voltage of the slave devices to deliver the same current as the master device. Artiﬁcial droop resistance is added to the output voltage path to control the slope of the load line curve, calibrating out the physical parasitic mismatches due to power train components and PWB layout. Up to 7 devices can be conﬁgured in a given current sharing group. shutdown of the device.
PAGE 25
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series VOUT VOUT V1 MASTER V2 SLAVE t t Illustration of Ratiometric Voltage Tracking Illustration of Output Voltage Sequencing. Output Voltage Sequencing A group of products may be conﬁgured to power up in a predetermined sequence. This feature is especially useful when powering advanced processors, FPGAs, and ASICs that require one supply to reach its operating voltage prior to another.
PAGE 26
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Eq. 5.  = RGCB CGCB ≤ 1μs, where RGCB is the pull up resistor value and CGCB is the bus loading. The pull-up resistor should be tied to an external supply voltage in range from 3.3 to 5 V, which should be present priorμ to or during power-up. Products with P2 as reference OTP: When TP2 as deﬁned in thermal consideration section exceeds 120°C the product will shut down.
PAGE 27
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Default conﬁguration: Continues Conduction Mode, CCM Pli DCM, DiscontinInput idling power ues Conduction (no load) Mode (diode emulation) DCM with Minimum Pulse Enabled PCTRL Input standby power Load transient peak voltage deviation Vtr1 Load step 25-75-25% of max IO Load transient recovery time ttr1 Load step 25-75-25% of max IO Turned off with CTRL-pin Default conﬁguration di/dt = 2 A/μs CO = 470 μF DLC and Optimized NLR conﬁguration di/dt =
PAGE 28
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Output Load Transient Response, Default Conﬁguration Output Ripple vs. Switching frequency [mVpk-pk] 60 50 0.6 V 40 1.0 V 30 1.8 V 3.3 V 20 10 0 200 300 400 500 600 [kHz] Output voltage ripple Vpk-pk at: TP1 = +25 °C, VI = 12 V, CO = 470 μF/10 mΩ, IO = 50 A resistive load. Default conﬁguration except changed frequency. Output voltage response to load current step-change (12.5-37.5-12.5 A) at: TP1 = +25 °C, VI = 12 V, VO = 1.
PAGE 29
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Thermal Consideration AIR FLOW General The product is designed to operate in different thermal environments and sufﬁcient cooling must be provided to ensure reliable operation. P1 Cooling is achieved mainly by conduction, from the pins to the host board, and convection, which is dependent on the airﬂow across the product. Increased airﬂow enhances the cooling of the product.
PAGE 30
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Unused input pins Unused SDA, SCL and GCB pins should still have pull-up resistors as speciﬁed. Unused VTRK or SYNC pins should be left open or connected to the PREF pin. SIP Version: Pin layout, top view (component placement for illustration only).
PAGE 31
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Typical Application Circuit (SIP version) Standalone operation with PMBus communication. Top view of product footprint. Typical Application Circuit (Parallel Operation) www.murata-ps.com/support MDC_OKDx-T/50-W12-C.
PAGE 32
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series PMBus interface This product provides a PMBus digital interface that enables the user to conﬁgure many aspects of the device operation as well as to monitor the input and output voltages, output current and device temperature. The product can be used with any standard two-wire I2C or SMBus host device. In addition, the product is compatible with PMBus version 1.
PAGE 33
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series ﬁgure below. Recommended resistor values for hard-wiring PMBus addresses are shown in the table. 1% tolerance resistors are required. Addresses listed in the table below are reserved or assigned according to the SMBus speciﬁcation and may not be usable. Refer to the SMBus speciﬁcation for further information. SA0 SA1 R SA1 R SA0 PREF Schematic of connection of address resistor.
PAGE 34
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series PMBus Commands The products are PMBus compliant. The following table lists the implemented PMBus read commands. For more detailed information see PMBus Power System Management Protocol Speciﬁcation; Part I – General Requirements, Transport and Electrical Interface and PMBus Power System Management Protocol; Part II – Command Language.
PAGE 35
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Designation TEMPCO_CONFIG IOUT_OMEGA_OFFSET* AUTO_COMP_CONTROL** AUTO_COMP_CONFIG** DEADTIME DEADTIME_CONFIG DEADTIME_MAX SNAPSHOT SNAPSHOT_CONTROL DEVICE_ID USER_DATA_00 Group Commands SEQUENCE GCB_CONFIG GCB_GROUP ISHARE_CONFIG PHASE_CONTROL Supervisory Commands PRIVATE_PASSWORD PUBLIC_PASSWORD UNPROTECT SECURITY_LEVEL Cmd DCh BEh BDh BCh DDh DEh BFh EAh F3h E4h B0h Impl Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes E0h D3h E2h D2h F0h Yes Yes Yes Y
PAGE 36
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series MECHANICAL SPECIFICATIONS-THROUGH-HOLE MOUNT All component placements – whether shown as physical components or symbolical outline – are for reference only and are subject to change throughout the product’s life cycle, unless explicitly described and dimensioned in this drawing. www.murata-ps.com/support MDC_OKDx-T/50-W12-C.
PAGE 37
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series MECHANICAL SPECIFICATIONS-SURFACE MOUNT All component placements – whether shown as physical components or symbolical outline – are for reference only and are subject to change throughout the product’s life cycle, unless explicitly described and dimensioned in this drawing. www.murata-ps.com/support MDC_OKDx-T/50-W12-C.
PAGE 38
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series MECHANICAL SPECIFICATIONS-SIP VERSION All component placements – whether shown as physical components or symbolical outline – are for reference only and are subject to change throughout the product’s life cycle, unless explicitly described and dimensioned in this drawing. www.murata-ps.com/support MDC_OKDx-T/50-W12-C.
PAGE 39
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Soldering Information - Surface Mounting and Hole Mount through Pin in Paste Assembly The product is intended for forced convection or vapor phase reﬂow soldering in SnPb or Pb-free processes. The reﬂow proﬁle should be optimised to avoid excessive heating of the product. It is recommended to have a sufﬁciently extended preheat time to ensure an even temperature across the host PWB and it is also recommended to minimize the time in reﬂow.
PAGE 40
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Soldering Information - Hole Mounting The hole mounted product is intended for plated through hole mounting by wave or manual soldering. The pin temperature is speciﬁed to maximum to 270°C for maximum 10 seconds. A maximum preheat rate of 4°C/s and maximum preheat temperature of 150°C is suggested.
PAGE 41
OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series Soldering Information - Hole Mounting (SIP version) The product is intended for plated through hole mounting by wave or manual soldering. The pin temperature is speciﬁed to maximum to 270°C for maximum 10 seconds. A maximum preheat rate of 4°C/s and maximum preheat temperature of 150°C is suggested.