Datasheet > T6309B-BX

T6309B-BX

更新时间： 2024-01-05 07:44:34

品牌	Logo	应用领域
TMT		转换器
页数	文件大小	规格书
11页	133K
描述
Micropower Step-up DC/DC Converter

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中文翻译

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技术参数
数据手册

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T6309B-BX 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.77
Is Samacsys：	N	Base Number Matches：	1

T6309B-BX 数据手册

tmCH

T6309B

Micropower Step-up DC/DC Converter

FEATURES

GRNERAL DESCRIPTION

The T6309B is a step-up DC/DC converter

that drives LED with a constant current. The

device can driver up to 3 series LEDs from a

single-cell Li-Ion battery. Series connection of

the LEDs provides constant LED current that

results in uniform brightness.

• Matched LED Current with Overvoltage

Protection

• Drives LEDs in series

• Up to 85% Efficiency

• Low 400mV Feedback Reference,

Optional 1.19V Feedback Reference

• Internal Current Limit 250mA

• Under Voltage Lock Out Circuits

• 0.1uA Low Shutdown Supply Current

• 6-pin SOT-23 Package

The T6309B features a minimum off-time

current-limited PFM control scheme. The

LED current is set with an external sense

resistor (Rs) and is regulated by the feedback

pin (FB) that regulates the voltage across the

sense resistor to 400mV (typ). The low

400mV feedback reference voltage reduces

power loss and improves efficiency for LED

driver applications. Optional 1.19V feedback

reference is available for normal output

voltage applications like LCD bias. Output

overvoltage protection (OVP) is integrated to

prevent damage in case of output open circuit

condition (e.g. faulty LED). The OVP pin can

monitor the output voltage and turn off the

converter in the event of overvoltage

condition. The T6309B is available in SOT-

23-6 packages.

• ESD Human Body Mode Over 5KV

APPLICATIONS

• Cellular Phones

• Portable Communication Devices

• Handheld Electronics

• PDAs

• LED/Display Back Light Driver

PART NUMBER EXAMPLES

Feedback Referemce

Part no.

Voltage

400mV

1.19V

T6309B-AX

T6309B-BX

TM Technology Inc. reserves the right

P. 1

Publication Date: SEP. 2005

Revision: A

to change products or specifications without notice.

12 3 4 5 6 7...11

中文翻译

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