RT4832AWSC Richtek

RT4832A 2 Sub PMIC with Dual-Output Boost Converter with I C Interface for Flash LED and Backlight LED, Dual-Output LCD Bias and DSV Features General Description Input Voltage Range : 2.5V to 5.5V The RT4832A is an integrated total power solution for Internal Soft-start, UVLO, OTP, OCP Flash LED Driver, Backlight WLED Driver, and DSV Typical Shutdown Current : < 1A Driver. Flash LED Driver provides up to 2-CH 1.5A 40 to 85C Temperature Range applications. Back Light WLED Driver supports up to 2CH Back Light LED Driver 36V output for 10 WLEDs applications. And it provides Drives Up to 10 WLEDs in Two Strings 1024 steps LED current with logarithmic/linear curve. 2 External PWM Pin Control and I C DSV is implemented by one single inductor boost and Programmable 11 bit Linear and Exponential inverting charge pump, which provide customers Brightness minimum EVB area compared to dual inductors. The LED Current Accuracy 5% (>500A), 3% negative output power (CPOUT) comes from boost (>5mA) output (LCMOUT). It also provides DSV positive 2 I C Programmable OVP 18/22/25/29/33/36V voltage (POS), which power noise is reduce by passing 2CH Flash LED Driver though LDO. Their ranges can be programmed from Torch Mode Current from 25mA to 375mA per 4V to 6V per 50mV step respectively. Flash Boost 25mA Step with 2 Channels Converter operates at 2MHz/4MHz frequency. The Strobe Mode Current from 100mA to 1.5A per 4MHZ frequency solution allows tinny and low-profile 100mA Step with 2 Channels components. Torch Mode Current can be set from 2 I C Programmable Flash Safety Timer from 25mA to 375mA per 25mA step. And Strobe Mode 32ms to 1024ms per 32ms Step Current range is from 100mA to 1.5A per 100mA step. High Accurate Safety Timer 10%, Current DSV drives TFT-LCD panels up to 10 (from SFF to Accuracy 4% (>375mA), Current Matching MFF like tablets). These two output rails are usually 7% (>375mA) connected to Source Driver IC. Wide input voltage VIN Monitor Protection from 2.5V to 3.2V per range from 2.5V to 5.5V optimizes the single-cell 0.1V Step battery applications (Li-Ion, Ni-Li, Li-Polymer) and Selectable Input Current Limit 1.9/2.8A which symmetrical output current is up to 80mA. 2MHz/4MHz Switching Frequency for Flash LED The RT4832A provides complete protection such as Flash LED1/2 Short Protection, and Output VIN under voltage lockout, Vin monitor protection, over Short Protection current protection, over voltage protection, LED short Txmask Protection by Independent Pin protection, VOUT short protection and over DSV 2 temperature protection. I C Programmable Output Voltages The RT4832A is available in WL-CSP-30B 2.24x2.64 Flexible Boost Voltage, POS, CPOUT Default (BSC) package. Setting Regulated Voltage Output : 4V to 6V per 50mV Applications Step Smart Phones Positive Voltage Output : 4 to 6V per 50mv Step Probable Instruments Negative Voltage Output : 4 to 6V per 50mV Step User Selectable Output Fast Discharge Mode or Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS4832A-00 January 2017 www.richtek.com 1 RT4832A Float Mode when Turned Off Marking Information Independent Positive and Negative Enable 0X : Product Code Control by Two External Pins YMDNN : Date Code True Load Disconnect, OCP, and 0X YM Positive/Negative SCP Function DNN Ordering Information RT4832A Pin Configuration Package Type (TOP VIEW) WSC : WL-CSP-30B 2.24x2.64 (BSC) A1 A2 A3 A4 A5 Note : LCM LCM LED LED POS OUT SW GND SW Richtek products are : B1 B2 B3 B4 B5 RoHS compliant and compatible with the current LCM LED ENM ENP EN GND OUT requirements of IPC/JEDEC J-STD-020. C1 C2 C3 C4 C5 Suitable for use in SnPb or Pb-free soldering processes. SDA C1 AGND LED1 Txmask D1 D2 D3 D4 D5 CP SCL STRB PWM LED2 GND E1 E2 E3 E4 E5 Flash Flash Flash C2 VIN LED OUT SW F1 F2 F3 F4 F5 CP Flash Flash Flash Flash OUT LED OUT SW GND WL-CSP-30B 2.24x2.64 (BSC) Typical Application Circuit L2 D1 10H LED1 C8 2.2F L1 RT4832A 0.47H to 1H E4, F4 A5 FlashSW LEDSW V IN 2P10S C1 B5 E5 10F LEDOUT WLEDs VIN B3 EN D4 C5 PWM LED1 D3 STRB D5 LED2 C3 Txmask E3, F3 D2 FlashOUT SCL A2 C2 LCMOUT SDA C3 C7 B2 10F 10F ENP B1 ENM A1 POS L3 E2, F2 2.2H FlashLED A3 LCMSW V C4 IN C2 10F A4 4.7F LEDGND C1 C4 C1 AGND C5 F5 FlashGND 10F E1 D1 C2 CPGND F1 B4 CPOUT LCMGND C6 U1 10F Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS4832A-00 January 2017 2