Atmel LED Drivers MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface Datasheet Brief
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface General Description The Atmel® LED DriversMSL2160 and MSL2161 compact, high-power LED string drivers use external current control MOSFETs to sink up to 350mA per string, with current accuracy and matching better than 1.5%. The MSL2160/1 drive 16 parallel strings of LEDs, and offer fault detection and management of open and short circuit LEDs.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface Key Features • 12-bit PWM String Dimming • Global Intensity Control via Serial Interface • Fast Serial Interfaces Support up to 8 Devices per Bus: • ±1.
Atmel LED Drivers-MSL2160/61 Overview The MSL2160/1 allows RGB LEDs to be driven by three separate string supplies, and feature three independent EO outputs to maximize the efficiency for each supply. Although not required, it is wise to use this capability even for single-color systems, such as white backlighting LEDs in an LCD monitor or TV application. The MSL2160/1 LED string controllers drive, monitor, and dim multiple LEDs at high efficiency for LCD backlighting and signage applications.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface Table 2.
Figure 3. Package Dimensions: 64-pin, 9mm x 9mm x 0.85mm TQFN (0.5mm pin pitch) with Exposed Pad.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface Atmel LED Drivers-MSL2160/MSL2161 7
Package Pin Descriptions Table 3. Pin Assignments PIN MSL2161 MSL2160 PIN DESCRIPTION 1 G4 G4 Gate output 4 Gate drive output for external MOSFET 4. Connect G4 to the gate of the external MOSFET driving LED string 4. If unused, leave G4 unconnected. 2 D4 D4 Drain sense input 4 Drain sense input for external MOSFET 4. Connect D4 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 4. If unused, connect D4 to ground.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface PIN 11 12 13 14 PIN NAME MSL2161 D7 NC SDA SCL PIN DESCRIPTION MSL2160 D7 MISO MOSI SCK Drain sense input 7 Drain sense input for external MOSFET 7. Connect D7 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 7. If unused, connect D7 to ground. MSL2161: No connect Make no connection to NC.
Table 3. Pin Assignments PIN 24 25 26 27 28 29 30 31 32 33 34 10 PIN NAME MSL2161 S9 G9 D9 S10 G10 D10 S11 G11 D11 S12 G12 MSL2160 PIN DESCRIPTION S9 Source sense input 9 Source sense input for external MOSFET 9. Connect S9 to the source of the external MOSFET and to the current sense resistor for LED string 9. The full-scale LED current threshold is reached when 500mV is across the current sense resistor. If unused, connect S9 to ground.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface PIN 35 36 37 38 39 40 41 42 43 PIN NAME MSL2161 D12 S13 G13 D13 S14 G14 D14 S15 G15 MSL2160 PIN DESCRIPTION D12 Drain sense input 12 Drain sense input for external MOSFET 12. Connect D12 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 12. If unused, connect D12 to ground.
Table 3. Pin Assignments PIN PIN DESCRIPTION MSL2161 MSL2160 46 PHI PHI Phase synchronization input Drive PHI with an external signal from 40Hz to 10kHz to synchronize the MSL2160/1 clock. PHI is typically driven with the VSYNC signal. 47 GSC GSC Gate shift clock input Drive GSC with the gate shift clock of the video signal, from to MHz. GSC is typically driven with the HSYNC signal. 48 PWM PWM PWM input PWM allows external control of the brightness of all LED strings.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface PIN 57 58 59 60 61 62 63 PIN NAME MSL2161 D1 S2 G2 D2 S3 G3 D3 MSL2160 PIN DESCRIPTION D1 Drain sense input 1 Drain sense input for external MOSFET 1. Connect D1 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 1. If unused, connect D1 to ground. S2 Source sense input 2 Source sense input for external MOSFET 2.
Absolute Maximum Ratings Voltage (With Respect to GND) VIN, EN, D0 - D15............................................................................................................................................................. -0.3V to +16V G0 - G15............................................................................................................................................................... -0.3V to (VIN + 0.3V) VDD...........................................................................
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface Electrical Characteristics Typical Application Circuit, VVIN = 12V, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C PARAMETER SYMBOL CONDITIONS AND NOTES MIN TYP MAX UNIT 10.8 12 13.
PARAMETER SYMBOL CONDITIONS AND NOTES MIN TYP MAX UNIT SPI LOGIC LEVELS, MSL2160 0.7 x VVDD MOSI, SCK, CSB Input High Voltage V 0.3 x VVDD MOSI, SCK, CSB Input Low Voltage MISO Output High Voltage ISOURCE = 5mA MISO Output Low Voltage ISINK = 6mA PARAMETER SYMBOL CONDITIONS AND NOTES VVCC – 0.4 MIN V V TYP 0.4 V MAX UNIT I2C LOGIC LEVELS, MSL2161 0.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface PARAMETER SCK Falling Edge to MISO Data Valid SYMBOL tVALID CONDITIONS AND NOTES MIN TYP (Note 1) MAX UNIT 20 ns SCK High Time 20 ns SCK Low Time 20 ns MOSI, CSB, SCK Signal Rise Time tR(SPI) Receiving (Note 6) 5.0 MOSI, CSB, SCK Signal Fall Time tF(SPI) ns Receiving (Note 6) 5.
Typical Application Circuit Figure 4.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface Detailed Description The MSL2160 and MSL2161 are highly integrated, flexible, multi-string LED drivers that use external MOSFETs to allow high LED string currents, and include power supply control to maximize efficiency. The drivers optionally connect to a video subsystem to offer a simple architecture for use in LCD TV backlight applications.
Internal Regulators and Enable Input The MSL2160/1 includes two internal linear regulators that provide VCC (5V) and VDD (2.5V) for internal circuitry. VIN (12V nominal) supplies the VCC and VDD regulators. Bypass VIN to GND with a 10µF capacitor close to the device. Bypass VCC to GND with a 4.7µF capacitor close to the device. Bypass VDD to GND with a 4.7µF capacitor close to the device. The MSL2160/1 enables input, EN, enables the device.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface Connecting the Efficiency Optimizer to an LED String Power Supply and Selecting Resistors The MSL2160/1 are designed to control external LED string power supplies that use voltage dividers (RTOP and RBOTTOM in Figure 5) to set the output voltage, and whose regulation feedback voltage is not more than 3.5V.
Register Map and the EEPROM Register Map Summary Control the MSL2160/1 using the registers in the range 0x00 - 0xBF (Table 4). Two additional registers, 0xC0 and 0xC1, allow access to, and programming of, the EEPROM. The power-up default values for all control registers are stored within the on-chip EEPROM, and any of these EEPROM values may be changed through the serial interface. Table 4.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface ADDRESS AND REGISTER NAME GSCMAX Max oscillator cycles between GSC pulses PHICTRL PHI processing control PHICNTR Internal clock counter for PHI PHIMUL PHI multiplier PHIMAX Max GSC cycles between PHI pulses 0x25 0x26 0x27 0x28 0x29 0x2A 0x2B 0x2C 0x2D FUNCTION PWMCTRL0 REGISTER DATA D7 D6 D5 D4 D3 PHICHKSEL - - - - - - PHIMAX[7:0] PHIMAX[15
ADDRESS AND REGISTER NAME ↓ 0x7E 0x7F ↓ ↓ PWM15 PWM setting for string 14 ALTSTR0SET Alternate phase delay for string 0 0x80 0x81 ↓ 0xA0 0xA1 ↓ 0xBE 0xBF REGISTER DATA D7 D6 D5 D4 D3 - - - PWM15[11:8] - - - - ALTPHDLY[11:8] ↓ ALTPHDLY15[7:0] ALTSTR15SET ALTPWM0 Alternate PWM setting for string 0 - - - - ALTPHDLY[11:8] ALTPWM0[7:0] - - - - ALTPWM0[11:8] ↓ ↓ ↓ ALTPWM15 Alternate PWM setting for string 15 ALTPWM15[7:0] 0xC1 E2CTRLSTA EEPROM read/write access D0 ALT
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface Register Power-up Defaults Register power-up default values are shown in Table 5. Table 5.
Table 5.
Atmel LED Drivers-MSL2160/MSL2161 16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface POWER-UP CONDITION REGISTERS INITIALIZED FROM EEPROM REGISTER NAME AND ADDRESS 0x80 0x81 ↓ 0x9E 0x9F 0xA0 0xA1 ↓ 0xBE 0xBF ALTSTR0SET ↓ D7 D6 D5 D4 D3 ALTPWM0 D1 D0 HEX 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 40 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 1 0 02 ↓ All strings set wit
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