SY7201A中文資料矽力杰數(shù)據(jù)手冊PDF規(guī)格書

General Description

SY7201 and SY7201A are DC/DC step-up converters

that deliver an accurate constant current for driving

LEDs. Operation at a fixed switching frequency of

1MHz allows the device to be used with small value

external ceramic capacitors and inductor. LEDs

connected in series are driven with a regulated current

set by the external resistor. The SY7201 and SY7201A

are ideal for driving up to eight white LEDs in series or

up to 30V.

Features

? Input voltage range: 2.8 to 30V

? Switch current limit 2A

? Drives LED strings up to 30V

? 1MHz fixed frequency minimizes the external

components

? Dimming frequency for EN/PWM pin:

ο SY7201: 20kHz~1MHz

ο SY7201A: 100Hz~10kHz

? Internal softstart limits the inrush current

? Open LED over voltage protection

? RoHS Compliant and Halogen Free

? Compact package: SOT23-6 pin

Applications

? GPS Navigation Systems

? Handheld Devices

? Portable Media Players