This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

Images are for reference only,

See Technical Specifications

ZXLD1321 +BOM

Switching Voltage Regulators

Manufacturer:

ZETEX
Mfr.Part #:

ZXLD1321
Datasheet:

ZXLD1321 Datasheet (PDF)
Type:

DC DC Regulator
Topology:

Step-Up (Boost)
Internal Switch(s):

Yes
Number of Outputs:

1
EDA/CAD Models:

Request Free CAD Models for ZXLD1321

Email: [email protected]

Skype: live:.cid.ab6b29428937b76

Tel: +852 95804164

ZXLD1321 General Description

The ZXLD1321 is an inductive DC-DC converter, with an internal switch, designed for driving single or multiple LEDs in series up to a total of 1A output current. Applications cover commercial environments with input voltages ranging from 1.2V to 12V. The device employs a variable 'on' and 'off' time control scheme with adjustable peak switch current limiting and supports step-up (Boost) mode and self-powering Bootstrap operating modes, offering higher power efficiency and lower system cost than conventional PFM circuitry. The device includes the DC-DC converter, a high-side current monitor and an NPN switching transistor to provide an integrated solution offering small PCB size, competitive cost/performance, high power efficiency of DC-DC conversion and maximum LED brightness/reliability. More importantly, it retains design flexibility to add customer specific features. The feedback control circuitry inside the ZXLD1321 provides excellent load and current regulation, resulting in very stable LED current over the useful life of the battery and over the full operating temperature range. The LED current can be adjusted from 100% down to 10% of the set value by applying a dc voltage to the ADJ pin and down to 1% by applying a PWM signal to the ADJ pin. An on-chip LED protection circuit also allows output current to be reduced linearly above a predetermined threshold temperature using an external thermistor at the T

Key Features

1.2V to 12V Input voltage range
Up to 1A output current
Typical efficiency >85%
Bootstrap operation enables input voltage down to 1V
User-defined thermal control of LED output current using external thermistor
High output current stability over input voltage and temperature
12μA typical standby current
LED current adjustable from 100% down to 2%
Adjustable soft-start
Drives up to 5 white LEDs in series

Application

High power LED flashlights
LED back-up lighting
General LED lighting
Emergency lighting

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)LED Drivers	Series	-
Type	DC DC Regulator	Topology	Step-Up (Boost)
Internal Switch(s)	Yes	Number of Outputs	1
Voltage - Supply (Min)	2V	Voltage - Supply (Max)	12V
Voltage - Output	18V	Current - Output / Channel	1A (Switch)
Frequency	600kHz	Dimming	PWM
Applications	Backlight, Lighting	Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount	Base Product Number	ZXLD1321