Datasheet > SSL3250A_0912

SSL3250A_0912

更新时间： 2024-11-06 06:14:15

品牌	Logo	应用领域
恩智浦 - NXP		驱动器闪光灯
页数	文件大小	规格书
26页	220K
描述
Photo flash dual LED driver

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SSL3250A_0912 数据手册

SSL3250A

Photo flash dual LED driver

Rev. 05 — 16 December 2009

Product data sheet

1. General description

The SSL3250A is a photo flash LED driver designed for battery operated mobile devices

such as mobile phones and PDAs. The boost converter delivers high performance and

drives a single or dual, high brightness LED at up to 500 mA with over 85 % efficiency.

The driver can be programmed to operate in Flash, Torch or Indicator / Video-on mode.

The small silicon size and the high internal switching frequency of 1.2 MHz minimize the

SSL3250A footprint making it very suitable for mobile phones where space is limited, and

only requiring four external components. Driving a high power flash LED within its safe

operating limits was a concern when the SSL3250A was designed, so a time-out function

can be programmed via the I²C interface, which will prevent overstressing the LED. Due

to the specific requirements of a mobile phone, the flash current can be rapidly lowered

during RF transmit by using optional external setting resistors.

2. Features

High power single, or dual, LED output driving up to 500 mA flash current

Separate indicator LED output of 2.5 mA to 20 mA

Output voltage of up to 9.5 V

Wide input voltage range of 2.7 V to 5.5 V

High efficiency, over 85 % at optimum output current

Switching frequency of 1.2 MHz

Flash, Torch, and Indicator mode supported

Internally timed flash operation up to 820 ms

I²C-bus, programmable up to 400 kHz

Strobe signal to avoid I²C latency for flash

Discrete enable signals for stand-alone operation

Optional resistor configurable output currents

Fast response to accommodate external TxMasking functionality

Soft start in Torch and Flash modes to avoid battery overloading

Integrated protection circuits for enhanced system reliability

Internal time-out function

OverTemperature Protection (OTP)

UnderVoltage LockOut (UVLO)

OverVoltage Protection (OVP)

Output current protection

Interrupt signaling to system controller

Low device shut-down current, less than 1 μA

SOT758-3, thermally enhanced 16 terminal HVQFN package

12 3 4 5 6 7...26

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