Datasheet > ZLED7002

ZLED7002

更新时间： 2024-11-27 01:10:51

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
12页	343K
描述
Toggle (Side-Step) Dual-Channel LED Driver

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中文翻译

获取价格

数据手册

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ZLED7002 数据手册

ZLED7002

Toggle (Side-Step) Dual-Channel

LED Driver

Datasheet

Features

Brief Description

• Automatic MAIN channel short-circuit protection

switches the output current to the SUB channel

if the MAIN LED is shorted

The ZLED7002 toggle (side-step) dual-channel LED

driver is one of our ZLED family of LED control ICs. It

operates in the lower DC voltage supply range of 2.7V to

5.5V. This unique LED driver is capable of controlling a

MAIN channel and a SUB channel. Typically, only one of

the two channels is active and the ZLED7002 toggles

between the channels automatically in response to the

voltage supply level and the related voltage at the UV

(under-voltage protection) pin. A high-to-low transition of

the power supply causes the output current to switch

from the MAIN channel to the SUB channel if the UV pin

voltage (V_UV-PIN) is below the ZLED7002’s under-voltage

threshold (V_UVTHRSH=1.17V, typical). A low-to-high tran-

sition switches the output current from the SUB channel

to the MAIN channel if the UV pin voltage is 80mV (typi-

cal) above the under-voltage threshold.

• Under-voltage power supply detection

• Over-temperature protection

Benefits

• Extends lighting life-time by switching to a lower-

current LED channel when the supply is low

• 80mV (typical) hysteresis prevents unintended

switching activation due to power supply ripple

• Ultra low quiescent current: 250μA typical

• Very few external components needed for operation

The MAIN channel is a configurable constant current

source driving the MAIN LED string with a maximum

current draw of 250mA. The MAIN LED channel current

is set by an external resistor (R3) connected to the Iset

pin. Alternately, the SUB channel is activated when the

ZLED7002’s SUB pin is pulled to ground. Its current is

determined by the forward voltage of the SUB LED and

external components. The SUB channel can drive up to

100mA current through the LED channel when active.

Available Support

• Evaluation Kit

Physical Characteristics

• Voltage supply: 2.7V to 5.5V DC

• Operating temperature: -25°C to 85°C

• Small SOP8 package

The ZLED7002 enables voltage-level indicator applica-

tions and low-power battery-driven lighting applications

that require switching to a lower-current LED channel

when the supply is low, which extends the lighting life-

time. Because the dropout voltage (V_DP) is minimal (as

low as 0.1V when the MAIN channel output current is

~200mA), the ZLED7002 is optimal for battery-powered

applications. Capable of operating efficiently with DC

voltage supplies ranging from 2.7V to 5.5V, it is ideal for

small portable lighting applications.

ZLED7002 Typical Application Circuit

2.7 to 5.5 V

The ZLED7002 can also reduce bill-of-material costs

because very few external components are required for

most applications, making it an optimal fit for small

devices for which lighting lifetime is critical. Only four

resistors, a diode, and a capacitor are needed for a

typical basic application.

ZLED7002

SUB

LED

MAIN

LED

VCC

SUB

MAIN

GND

Iset

SW1

April 20, 2016

12 3 4 5 6 7...12

中文翻译

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与ZLED7002相关器件

型号	品牌	获取价格	描述	数据表
ZLED7002KIT-E1	IDT	获取价格	Toggle (Side-Step) Dual-Channel LED Driver
ZLED7002ZI1R	IDT	获取价格	Toggle (Side-Step) Dual-Channel LED Driver
ZLED7002-ZI1R	IDT	获取价格	Display Driver, PDSO8
ZLED7010	IDT	获取价格	40V LED Driver with Temperature Compensation
ZLED7010KIT-D1	IDT	获取价格	40V LED Driver with Temperature Compensation
ZLED7010ZI1R	IDT	获取价格	40V LED Driver with Temperature Compensation
ZLED7010-ZI1R	ETC	获取价格	40V LED Driver with Temperature Compensation
ZLED7012	IDT	获取价格	Low-Voltage Four-Channel LED Driver
ZLED7012KIT-E1	IDT	获取价格	Low-Voltage Four-Channel LED Driver
ZLED7012ZI1R	IDT	获取价格	Low-Voltage Four-Channel LED Driver

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