TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 BIAS POWER SUPPLY FOR TV AND MONITOR TFT LCD PANELS Check for Samples: TPS65161, TPS65161A, TPS65161B FEATURES • • • • • 1 • • • • • 2 • • • • • • 8-V to 14.7-V Input Voltage Range VS Output Voltage Range up to 19 V TPS65161 has a 2.8-A Switch Current Limit TPS65161A has a 3.7-A Switch Current Limit TPS65161B has a 3.7-A Switch Current Limit and 100-mA Charge Pump Output Current 1.5% Accurate 2.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 DISSIPATION RATINGS PACKAGE RTHJA TA ≤ 25°C POWER RATING TA = 70°C POWER RATING TA = 85°C POWER RATING 28-Pin HTSSOP 28°C/W (PowerPAD (1) soldered) 3.57 W 1.96 W 1.42 W (1) See Texas Instruments application report SLMA002 regarding thermal characteristics of the PowerPAD package.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com ELECTRICAL CHARACTERISTICS (continued) VIN = 12 V, SUP = VIN, EN1 = EN2 = VIN, VS = 15 V, V(LOGIC) = 3.3 V, TA = –40°C to 85°C, typical values are at TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 3.3 4.8 6.2 μA 3.3 4.8 6.2 μA 6 9 12 μA FREQ = high 600 750 900 FREQ = low 400 500 600 1.136 1.146 1.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 ELECTRICAL CHARACTERISTICS (continued) VIN = 12 V, SUP = VIN, EN1 = EN2 = VIN, VS = 15 V, V(LOGIC) = 3.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com 1 28 SS COMP 2 27 GD OS 3 26 DLY2 SW 4 25 DLY1 SW 5 24 REF PGND 6 23 GND PGND 7 22 AVIN SUP 8 21 VINB EN2 9 20 VINB DRP 10 19 NC DRN 11 18 SWB FREQ 12 17 BOOT FBN 13 16 EN1 FBP 14 15 FBB Thermal PAD (see Note) FB NOTE: The thermally enhanced PowerPAD™ is connected to PGND.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 PIN FUNCTIONS PIN NAME NO. I/O DESCRIPTION SUP 8 I This is the supply pin of the positive charge pump driver and can be connected to the input supply VIN or the output of the main boost converter VS. This depends mainly on the desired output voltage VGH and numbers of charge pump stages. FREQ 12 I Frequency adjust pin.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 TYPICAL CHARACTERISTICS (continued) SOFT-START BOOST CONVERTER PWM OPERATION BOOST CONVERTER CONTINUOUS MODE VI = 12 V, VO = 15 V/1.5 A VI = 12 V, VO = 15 V/ 1.2 A, C(SS) = 22 nF VSW 10 V/div VO 50 mV/div VS 5 V/div I(Inductor) 1 A/div II 1 A/div 1 ms/div Figure 4. 2 ms/div Figure 3.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com TYPICAL CHARACTERISTICS (continued) STEP-DOWN CONVERTER rDS(ON) - N-CHANNEL SWITCH vs TEMPERATURE EFFICIENCY STEP-DOWN CONVERTER vs LOAD CURRENT 90 0.25 VI = 8 V, VI = 12 V, VI = 14 V r DS(on) − N-Channel Switch − Ω 80 70 Efficiency − % 60 50 40 30 20 VI = 12 V, VO = 3.3 V, L = 15 mH 10 0 0 0.5 1 1.5 IO − Output Current − A Figure 7. 2 0.2 0.15 0.1 0.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 TYPICAL CHARACTERISTICS (continued) SOFT-START STEP-DOWN CONVERTER LOAD TRANSIENT RESPONSE STEP-DOWN CONVERTER VI = 12 V, VO = 3.3 V/1.2 A VO1 100 mV/div VI = 12 V, V(LOGIC) = 3.3 V, CO = 2*22 mF, FREQ = High VO 1 V/div IO 270 mA to 1.3 A I(Inductor) 1 A/div 50 ms/div 200 ms/div Figure 11. Figure 12.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com TYPICAL CHARACTERISTICS (continued) POWER-UP SEQUENCING EN2 ENABLED SEPARATELY V(LOGIC) 2 V/div VS 5 V/div VGH 5 V/div EN2 2 V/div 1 ms/div Figure 15.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 TYPICAL CHARACTERISTICS (continued) FUNCTIONAL BLOCK DIAGRAM AVIN SW SW Q2 D SS Bias Vref=1.213 V Thermal Shutdown Sequencing GND FREQ 500 kHz/ 750 kHz Oscillator Clock DLY1 Current Limit and Soft Start DLY2 S AVIN OS OS IDLY Overvoltage Comparator SS Vref Control Logic SS AVIN Vref D S COMP PGND Q1 PGND GM Amplifier Comparator Sawtooth Generator FB VFB 1.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com DETAILED DESCRIPTION Boost Converter The main boost converter operates in pulse-width modulation (PWM) and at a fixed switching frequency of 500 kHz or 750 kHz set by the FREQ pin. The converter uses an unique fast response, voltage-mode controller scheme with input voltage feedforward. This achieves excellent line and load regulation (0.03%-A load regulation typical) and allows the use of small external components.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 Soft Start (Step-Down Converter) To avoid high inrush current during start-up, an internal soft start is implemented in the TPS65161. When the step-down converter is enabled over EN1, its reference voltage slowly rises from zero to its power-good threshold of typically 90% of Vref .
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com Negative Charge Pump The negative charge pump provides a regulated output voltage set by the external resistor divider. The negative charge pump operates similar to the positive charge pump with the difference that it runs from the input voltage VIN. The negative charge pump driver inverts the input voltage. The maximum negative output voltage is VGL = (–VIN) + Vdrop.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 EN2 EN1 DLY2 VGH VS VGH, VS VIN VIN V(LOGIC) DLY1 Fall Time Depends on Load Current and Feedback Resistor VGL GD Figure 18. Power-On Sequencing Using EN1 and EN2 Setting the Delay Times DLY1, DLY2 Connecting an external capacitor to the DLY1 and DLY2 pins sets the delay time. If no delay time is required, these pins can be left open.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com Table 1. Input Capacitor Selection CAPACITOR VOLTAGE RATING 22 μF/1210 16 V Taiyo Yuden EMK325BY226MM COMPONENT SUPPLIER CIN (VINB) COMMENTS 1 μF/1206 16 V Taiyo Yuden EMK316BJ106KL CIN (AVIN) Boost Converter Design Procedure The first step in the design procedure is to verify whether the maximum possible output current of the boost converter supports the specific application requirements.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 Table 3. Output Capacitor Selection (Boost Converter) CAPACITOR VOLTAGE RATING 22 μF/1812 16 V COMPONENT SUPPLIER Taiyo Yuden EMK432BJ226MM Rectifier Diode Selection (Boost Converter) To achieve high efficiency, a Schottky diode should be used. The reverse voltage rating should be higher than the maximum output voltage of the converter.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com Step-Down Converter Design Procedure Setting the Output Voltage The step-down converter uses an external voltage divider to set the output voltage. The output voltage is calculated as: V out + 1.213 V Ǔ ǒ1 ) R1 R2 with R2 as 1.2 kΩ, and internal reference voltage V(ref)typ = 1.213 V At load current <1 mA, the device operates in discontinuous conduction mode.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 Rectifier Diode Selection (Step-Down Converter) To achieve high efficiency, a Schottky diode should be used. The reverse voltage rating should be higher than the maximum output voltage of the step-down converter.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com Layout Consideration The PCB layout is an important step in the power supply design. An incorrect layout could cause converter instability, load regulation problems, noise, and EMI issues. Especially with a switching dc-dc converter at high load currents, too-thin PCB traces can cause significant voltage spikes. Good grounding becomes important as well.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 APPLICATION INFORMATION C1 2 * 22 μF C16 1 μF VGL −5 V/50 mA 8 12 20 21 22 C6 0.47 μF D2 D3 16 9 11 13 24 6 7 SW SW FB OS GND GD DRP FBP BOOT SWB NC FBB COMP DLY2 SUP FREQ VINB VINB AVIN EN1 EN2 DRN FBN REF PGND PGND 28 SS 25 DLY1 R3 620 kΩ C7 0.47 μF R4 150 kΩ C9 22 nF C8 220 nF C4 22 pF TPS65161 C3 1 μF 4 5 1 3 23 27 R1 680 kΩ C2 3 * 22 μF R2 56 kΩ C15 470 nF D4 GD C5 10 14 17 18 19 15 D5 0.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 www.ti.com L1 10 µH VIN 12 V C1 2*22 µF C3 VGL –5 V/50 mA D2 SUP FREQ VINB VINB AVIN EN1 EN2 DRN FBN C6 0.47µF D3 C7 0.47 µF REF PGND PGND SS DLY1 R3 620 kΩ R4 150 kΩ C8 220 nF C9 22 nF C10 10 nF SW SW FB OS GND GD DRP FBP BOOT SWB NC FBB COMP DLY2 C11 10 nF VS 18 V/1.3 A SI2343 R1 C4 22 pF TPS65161 1 µF C16 1 µF D1 SL22 825 kΩ C15 470 nF R9 510 kΩ C19 1 µF R10 100 kΩ R2 56 kΩ C5 0.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 VIN 12 V 10% C1 2 * 22 μF VGL −5 V/50 mA C16 1 μF 8 SUP 12 FREQ 20 VINB 21 VINB 22 AVIN 16 EN1 9 EN2 11 DRN 13 FBN 24 6 REF PGND 7 PGND 28 25 SS DLY1 C6 0.47 μF D2 R3 620 kΩ R4 150 kΩ C8 220 nF C4 22 pF TPS65161 C3 1 μF D3 C7 0.47 μF D1 SL22 L1 6.9 μH C9 22 nF C10 10 nF 4 5 1 3 23 27 SW SW FB OS GND GD 10 DRP 14 FBP 17 BOOT 18 SWB 19 NC 15 FBB 2 COMP 26 DLY2 C11 10 nF C15 470 nF VS 13.
TPS65161 TPS65161A, TPS65161B SLVS617E – APRIL 2006 – REVISED MARCH 2013 VIN 12 V www.ti.com L1 10 mH C1 2*22 mF TPS65161B 22 12 C16 1 mF 16 9 20 21 NC NC C17 22 nF R10 22 W* VGL -6.2 V/0.1 A R3 511 kW R4 100 kW C18 10 mF C19 33 pF* D2 C7 2.2 mF D3 27 19 2 11 C11 10 nF C8 220 nF C9 22 nF SW FREQ SW EN1 FB 4 5 R1 332 kW R2 24 kW EN2 VINB VINB OS 3 C15 470 nF GD NC SUP 8 C3 1 mF COMP DRN 25 DRP 26 24 28 23 6 7 FBP DLY1 DLY2 BOOT REF SS SWB PGND C13 2.
TPS65161 TPS65161A, TPS65161B www.ti.com SLVS617E – APRIL 2006 – REVISED MARCH 2013 REVISION HISTORY Changes from Original (April 2006) to Revision A • Page Added device number TPS65161A ...................................................................................................................................... 1 Changes from Revision A (Seotember 2007) to Revision B Page • Changed the ORDERING INFORMATION table ...............................................................................
PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 5-Feb-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TPS65161APWPR HTSSOP PWP 28 2000 330.0 16.4 6.9 10.2 1.8 12.0 16.0 Q1 TPS65161BPWPR HTSSOP PWP 28 2000 330.0 TPS65161PWPR HTSSOP PWP 28 2000 330.0 16.4 6.9 10.2 1.8 12.0 16.0 Q1 16.4 6.9 10.2 1.8 12.0 16.
PACKAGE MATERIALS INFORMATION www.ti.com 5-Feb-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS65161APWPR HTSSOP PWP 28 2000 367.0 367.0 38.0 TPS65161BPWPR HTSSOP PWP 28 2000 367.0 367.0 38.0 TPS65161PWPR HTSSOP PWP 28 2000 367.0 367.0 38.
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