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QX5252 Datasheet

LED Driver


QX5252 Datasheet Preview


QXMD
LED Driver QX5252
Overview:
QX5252 is a solar LED lighting fixtures for
ASIC design. It is driven by a switching
circuit, Optical switch circuit, over discharge
protection circuit, the internal integration of
Short Based diodes and other circuit. Can be
only one external inductor Composition of
solar lighting devices. QX5252 QX5252 using
patented technology, LED
Undervoltage shutdown makes no blinking
LED lights.
Package:
QX5252F: TO-94
QX5252E: DIP-8
QX5252
Features:
Operating voltage: 0.9V-1.5V
Output current: 3mA-300mA
Patented over-discharge protection: no flash off
Integrated light control switch
Integrated Schottky Diode
Only one inductor external components
High efficiency
TO-94, DIP-8 package
A typical application
Page 1

A typical application II
Pin Definition
Pin name
SBAT
BAT
VSS
LX
LS
NC
Package and pin number
TO-94
DIP-8
16
27
32
43
-5
- 1, 4, 8
Functional Description
Positive terminal
connected solar cells
Rechargeable battery
positive terminal
connection
Ground
Power switch drain
Optical detection input
Not connected (empty)
QX5252
TO-94
BAT LX
SBAT VSS
NC NC
VSS QX5252 BAT
LX
DIP-8
SBAT
NC LS
Page 2

Limit Parameter
Symbol
Vmax
Imax
TOPR
TSTG
VESD
Parameter
Value
Threshold voltage of the 5.5V
terminal IC
LX-side current limit 0.8A
Operating temperature -40 - +125
range
Storage Temperature -65 - +150
ESD voltage (Human 2000V
Body Model)
Units
V
A
°C
°C
V
LED power settings:
LED power consumption is set by the inductance L:
One VIN is charging the battery voltage.
PLED
=⋅2VIN
L
10 6
Light control switch set:
QX5252F:
directly controlled by the solar panels.
QX5252E:
LS side need to add a photosensitive resistor and a normal resistance.
LS voltage is set by the following formula:
VLS =
R1
R1+R2 VIN
When VLS is higher than 0.3 * VIN, the light control switch shuts the LED off, when VLS is lower
than 0.22 * VIN, the light control switches LED lights on.
Voltage 1.3V
L 330uH
11mA
1.3V 1.3V 1.3V
270uH 220uH 150uH
14.5mA 15.5mA 25mA
1.3V 1.3V
100uH 82uH
34.5mA 38mA
1.3V
56uH
50mA
1.3V
47uH
75mA
1.3V
33uH
110mA
Page 3
Part Number QX5252
Manufactur Qxmd
Description LED Driver
Total Page 5 Pages
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