Description

The SC4505 is a high-frequency PWM current-mode step up switching regulator with an integrated 2A power transistor. Its high switching frequency (1MHz) allows the use of tiny surface-mount external passive components. The internal switch is rated at 36V which makes the converter ideal for multiple LED series operation with optimal current matching. Two programmable independent current source structure allows dual panel LED backlight and flash operation.

Features

‹Two independent current sources for dual LED strandswith optimal current/light matching. acklight up to75mA, Flash up to 125mA

‹Wide input range from 2.6V to 12V

Adaptive output voltage up to 28V with OVP protection against open circuit conditions

Low shutdown current (<1µA )

Internal Flash/Torch mode with flash timeout to protect LEDs

1MHz Fixed Frequency Current-Mode Control

Internal 2A current limit for driving large numbers of LEDs

Supports PWM Dimming from 50Hz to 50kHz

Internal undervoltage lockout

Small, low profile, thermally enhanced 16-MLPQ package is fully WEEE and RoHS compliant

SC4505MLTRT属于集成电路（IC） > 稳压器 - DC-DC 开关稳压器。Semtech Corporation制造生产的SC4505MLTRT稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。