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QX5305 Datasheet Preview

QX5305 Datasheet

Boost LED Constant Current Driver

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QX5305
Boost LED Constant Current Driver
General Description
QX5305 is a high efficient boost type LED
driver IC. It is especially suited to drive
several high power and high luminance
LEDs in series.
QX5305 uses fixed off-time control scheme,
and 1MHz switching frequency can be
achieved.
QX5305 set the off-time by an external
capacitor, the minimum off-time is 620ns
and the off-time can be adjusted by changing
the external capacitor, and the operating
frequency also can be adjusted according to
the need of customers.
QX5305 regulates the current flowing
through LEDs to set the luminance of LEDs
by changing the external resistor, on the
other hand, the luminance of LEDs also can
be regulated by a PWM signal applied to EN
pin.
Features
High Efficiency: up to 95%
Switching Frequency: up to 1MHz
Wide Range Input Voltage:3.6V to 100V
UVLO Voltage: 2.5V
Peak Current Sense Voltage: 250mV
Adjustable Luminance With PWM
Signal Applied to EN Pin
Adjustable Off-time
Internal Current Sampling Leading Edge
Blanking Circuit
Applications
Battery-powered LED lights
Flat panel display LED backlight
Constant current charger control
Power LED lighting
Typical Application
VIN
L1
R1
CIN
Z1
C1
VDD
DRV
EN QX5305
TOFF
VSS
COMP
CS
FB
COFF
RC
CC
D1
Z2
LED
R2 COUT
RCS
RFB
QX5305_DS04EN
Figure 1Typical Application Circuit Diagrams of QX5305
QX Micro Devices Co., Ltd.
www.qxmd.com.cn
1 of 9




Qxmd

QX5305 Datasheet Preview

QX5305 Datasheet

Boost LED Constant Current Driver

No Preview Available !

QX5305
Boost LED Constant Current Driver
Ordering Information
Type Number
QX5305
Package Marking
5305
XXXX
Lot Number
Date
Pin Assignments
1
VSS
EN
COMP
FB
4
SOP8
8
VDD
TOFF
CS
DRV
5
QX5305_DS04EN
QX Micro Devices Co., Ltd.
www.qxmd.com.cn
2 of 9


Part Number QX5305
Description Boost LED Constant Current Driver
Maker Qxmd
Total Page 9 Pages
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