UM1663S-LED背光驱动升压型转换器-开关稳压器-电源供应-英联产品-英联

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UM1663S
具有38V/1.0A MOSFET的PWM模式升压型DC-DC转换器

Datasheet

Reliability Report

Package Information

	Outline-SOT23-6.pdf
	Land Pattern-SOT23-6.pdf

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Key Specifications

Part Number

Description

Status

Channels(.)

Vin (Min)(V)

Vin (Max)(V)

Vout (Min)(V)

Vout (Max)(V)

Isw (Peak)(A)

Switching Frequency(Max)(kHz)

Type

LED Current Per Channel(mA)

LED(.)

Topology

Duty Cycle(Max)(%)

Shutdown Current(Max)(μA)

Peak Efficiency(%)

Operating Temperature Range(°C)

Pin/Package

EV Kit Available?

UM1663S

具有38V/1.0A MOSFET的PWM模式升压型DC-DC转换器

ACTIVE

2.8

5.5

1000

Inductive

Boost

-40 to 85

6/SOT23

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Product Description

The UM1663S is a highly integrated LED driver IC capable of driving 10 WLEDs in series. It is composed of a current mode boost converter integrated with a 38V/1A power switch.

The UM1663S supports a wide input voltage range from 2.8Vto 5.5V and runs at a fixed frequency of 1MHz. The LED current is set via an external resistor and the feedback voltage is regulated to 200mV. During operation, the LED current is controlled by the duty cycle of the SHDN input signal, which determines the feedback reference voltage.

The UM1663S can modify dimming to support 64-step pulse dimming. More details are shown in the Timing Diagram section.

The UM1663S also has internal overvoltage protection setting to prevent the output from exceeding the absolute maximum ratings during open LED conditions. It is available inGreenSOT23-6 package and operates over an ambient temperature range of -40°C to +85°C.

Features

- High Output Voltage: Up to 36V

- Internal Soft-Start and Compensation

- 200mV Reference Voltage

- PWM Dimming and Frequency Range from 500Hzto 50kHz

- 64-Step Pulse Dimming

- Open LED Protection

- Internal Over Voltage Protection Setting

- Over Temperature Protection

- Current Limit Protection

- RoHS Compliant and Halogen Free

Typical Application Circuit