Datasheet > RT4832A

RT4832A

更新时间： 2024-01-07 23:03:46

品牌	Logo	应用领域
立锜 - RICHTEK		集成电源管理电路
页数	文件大小	规格书
26页	1666K
描述
Sub PMIC with Dual-Output Boost Converter

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技术参数
数据手册

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RT4832A 技术参数

Status：	Active	Vin (min) (V)：	2.5
Vin (max) (V)：	5.5	Number of Channels：	3
Number of Buck Converters：	0	Number of Boost Converters：	3
Number of Negative Outputs：	1	Number of LED Drivers：	1
Number of LDO Regulators：	1	Features：	Enable Input;OCP;OVP;SCP
Package Type：	WL-CSP2.24x2.64-30(BSC)	Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/RT4832A/DS4832A-00.pdf

RT4832A 数据手册

RT4832A

Sub PMIC with Dual-Output Boost Converter with I²C

Interface for Flash LED and Backlight LED, Dual-Output LCD

Bias and DSV

Features

General Description

 Input Voltage Range : 2.5V to 5.5V

 Internal Soft-start, UVLO, OTP, OCP

 Typical Shutdown Current : < 1A

 40 to 85°C Temperature Range

 2CH Back Light LED Driver

The RT4832A is an integrated total power solution for

Flash LED Driver, Backlight WLED Driver, and DSV

Driver. Flash LED Driver provides up to 2-CH 1.5A

applications. Back Light WLED Driver supports up to

36V output for 10 WLEDs applications. And it provides

1024 steps LED current with logarithmic/linear curve.

DSV is implemented by one single inductor boost and

inverting charge pump, which provide customers

minimum EVB area compared to dual inductors. The

negative output power (CPOUT) comes from boost

output (LCMOUT). It also provides DSV positive

voltage (POS), which power noise is reduce by passing

though LDO. Their ranges can be programmed from

±4V to ±6V per 50mV step respectively. Flash Boost

Converter operates at 2MHz/4MHz frequency. The

4MHZ frequency solution allows tinny and low-profile

components. Torch Mode Current can be set from

25mA to 375mA per 25mA step. And Strobe Mode

Current range is from 100mA to 1.5A per 100mA step.

 Drives Up to 10 WLEDs in Two Strings

 External PWM Pin Control and I²C

Programmable 11 bit Linear and Exponential

Brightness

 LED Current Accuracy 5% (>500A), 3%

(>5mA)

 I²C Programmable OVP 18/22/25/29/33/36V

 2CH Flash LED Driver

 Torch Mode Current from 25mA to 375mA per

25mA Step with 2 Channels

 Strobe Mode Current from 100mA to 1.5A per

100mA Step with 2 Channels

 I²C Programmable Flash Safety Timer from

32ms to 1024ms per 32ms Step

 High Accurate Safety Timer ±10%, Current

Accuracy 4% (>375mA), Current Matching

7% (>375mA)

DSV drives TFT-LCD panels up to 10” (from SFF to

MFF like tablets). These two output rails are usually

connected to Source Driver IC. Wide input voltage

range from 2.5V to 5.5V optimizes the single-cell

battery applications (Li-Ion, Ni-Li, Li-Polymer) and

which symmetrical output current is up to 80mA.

 VIN Monitor Protection from 2.5V to 3.2V per

0.1V Step

 Selectable Input Current Limit 1.9/2.8A

 2MHz/4MHz Switching Frequency for Flash LED

 Flash LED1/2 Short Protection, and Output

Short Protection

The RT4832A provides complete protection such as

VIN under voltage lockout, Vin monitor protection, over

current protection, over voltage protection, LED short

protection, VOUT short protection and over

temperature protection.

 Txmask Protection by Independent Pin

 DSV

 I²C Programmable Output Voltages

 Flexible Boost Voltage, POS, CPOUT Default

Setting

The RT4832A is available in WL-CSP-30B 2.24x2.64

(BSC) package.

 Regulated Voltage Output : 4V to 6V per 50mV

Step

Applications

 Smart Phones

 Positive Voltage Output : 4 to 6V per 50mv Step

 Negative Voltage Output : 4 to 6V per 50mV

Step

 Probable Instruments

 User Selectable Output Fast Discharge Mode or

is a registered trademark of Richtek Technology Corporation.

DS4832A-00 January 2017

www.richtek.com

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