ZXLD1322DCCTC データシートの表示（PDF） - Diodes Incorporated.

部品番号

コンポーネント説明

メーカー

ZXLD1322DCCTC

BUCK/BOOST MODE DC-DC CONVERTER FOR LED DRIVING WITH 700mA OUTPUT AND CURRENT CONTROL

Diodes Incorporated. 

A Product Line of

Diodes Incorporated

ZXLD1322

Pin Description

Name

ADJ

BIAS

CFB

N/C

ISENSE

EMITTER1

EMITTER2

COLLECTOR2

COLLECTOR1

N/C

M_VIN

VIN

TADJ

VREF

Exposed Pad

Pin #

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Description

Adjust input

• Leave floating, or connect to VREF to set 100% output current.

• Drive with dc voltage. (50mV<VADJ< VREF) to adjust output current from 10% to 100%

of set value. (DC brightness control mode)

• Drive with low frequency (200Hz) PWM control signal to gate output ‘on’ and ‘off’ at

the PWM frequency. (PWM brightness control mode)

• Drive with low level dc voltage (VADJ<28mV) to turn off device (Standby mode)

Bias pin for setting base current of internal switch transistor

• Short pin to ground to define maximum base drive current for output switch

(Maximum output current condition)

• Connect resistor (RBIAS) from this pin to ground to reduce base drive current

(Reduced output current condition)

Control input/output for feedback control loop

• Connect 10nF capacitor from this pin to ground to provide loop compensation

Not connected internally (Open circuit)

Switch peak current sense pin

• Connect resistor (RSENSE) from this pin to ground to define peak switch current

(ISWPEAK)=0.05/RS

Switch emitters (Connect both pins to top of RSENSE to sense emitter current)

Switch Collectors (Connect both pins to lower side of coil)

Internally connected - Do not connect to external circuitry

Input supply to high side current monitor

• Connect output voltage (whichever is higher)

• Connect resistor (RM) from this pin to to VIN to define nominal average output (LED)

current of 0.1/RM

Input supply voltage and load side input of high side current monitor.

Connect to sensing resistor RM.

Temperature Adjust input for LED thermal compensation

• Connect thermistor/resistor network to this pin to reduce output current above a

preset temperature threshold.

• Connect to VREF to disable thermal compensation function

(see section on temperature control for details)

Internal 0.5V reference voltage output

Connect to ground (0V)

ZXLD1322

Document number: DS32166 Rev. 3 - 2

3 of 17

www.diodes.com

April 2010

© Diodes Incorporated

Share Link: