ZXLD1374

ZXLD1374

Document number: DS35032 Rev. 1 - 2

Page 3 of 35

www.diodes.com

October 2010

© Diodes Incorporated

A Product Line of

Diodes Incorporated

Symbol

Parameter

Rating

Unit

Input supply voltage relative to GND

‡

-0.3 to 65

V

Auxiliary supply voltage relative to GND

‡

-0.3 to 65

V

Current monitor input relative to GND

‡

-0.3 to 65

V

-0.3 to 5

V

Low side switch output voltage to GND

‡

-0.3 to 65

V

Low side switch continuous output current

1.8

A

Status pin output current

±1

mA

Flag output voltage to GND

‡

-0.3 to 40

V

Other input pins to GND

‡

-0.3 to 5.5

V

Maximum junction temperature

150

°C

Storage temperature

-55 to 150

°C

These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure.

Operation at the absolute maximum rating for extended periods may reduce device reliability.

Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and

transporting these devices.

Notes:

Package Thermal Data

Thermal Resistance

Package

Unit

Junction-to-Case,

TSSOP-20EP

4

°C/W

Recommended Operating Conditions

Symbol

Parameter

Performance/Comment

Min

Max

Unit

Input supply voltage range

Normal operation

8

60

V

Functional (Note 2)

6.3

Auxiliary supply voltage range (Note 3)

Normal operation

8

60

V

Functional

6.3

Differential input voltage

0

450

mV

Low side switch output voltage

60

V

Low side switch continuous output current

1.5

A

External dc control voltage applied to ADJ

pin to adjust output current

DC brightness control mode

from 10% to 200%

0.125

2.5

V

Status pin output current

100

µA

Reference external load current

REF sourcing current

1

mA

Recommended switching frequency range (Note 4)

300

1000

kHz

0

V

Recommended PWM dimming frequency range

To maintain 1000:1 resolution

100

500

Hz

To maintain 200:1 resolution

100

1000

Hz

PWM pulse width in dimming mode

PWM input high or low

0.005

10

ms

PWM pin high level input voltage

2

5.5

V

PWM pin low level input voltage

0

0.4

V

Operating Junction Temperature Range

-40

125

°C

GI

Gain setting ratio for Boost and Buck-boost modes

0.20

0.50

Notes:

2.

3.

4.

The device contains circuitry to control the switching frequency to approximately 400kHz. The maximum and minimum

operating frequency is not tested in production.