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HM7502PR 数据表(PDF) 1 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

部件名 HM7502PR
功能描述  2-channel Constant Current Regulator
PDF  9 Pages
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制造商  HMSEMI [Shenzhen Huazhimei Semiconductor Co., Ltd]
网页  http://www.hmsemi.com/
标志 HMSEMI - Shenzhen Huazhimei Semiconductor Co., Ltd

HM7502PR 数据表(HTML) 1 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

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©1999~2014
2-channel Constant Current Regulator
1
2-channel Constant Current Regulator
INTRODUCTION
The HM7502 is a 2-channel LED driver, designed for current
regulation. It may be used in various current regulation circuits,
especially suitable for LED applications. It lets LEDs work
under stable current and avoid brightness unstable caused by
current change, while its low voltage can reduce power
consumption.
The connection of the VDD power pin may also be used for
brightness control of LEDs via PWM signals; therefore suitable
for applications that need brightness adjustment.
The connection of REXT pin can be used for the control of
output current, to control and drive more LEDs. When REXT is
open, VCH1, VCH2 pins may provide 30mA of current. To
achieve operations with VCH1/VCH2 current over 60mA,
connect the ICs in parallel.
MAIN APPLICATIONS
•
LED Light Bars, LED Bulbs, LED Fluorescent Lights,
LED Backlight
FEATURE HIGHLIGHTS
•
Wide operation supply voltage range: 2.5V ~ 40V
•
Wide output voltage range: 2.5V~40V
•
30mA to 60mA /per channel sink current
•
Accurate sink current: ± 5%
•
VDD pin as OE function: up to 100KHz frequency
•
Negative temperature coefficient: ± 500ppm/ oC
•
Less than ±0.5%/V load regulation
•
–40 oC ~+85 oC operation temperature range
•
High temperature protection: 95 oC ~ 155oC
•
Pb-free and green package: SOT89-5, SOT23-5
BLOCK DIAGRAM


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