L8532 Datasheet PDF - Unisonic Technologies
| Part Number | L8532 | |
| Description | POWER FACTOR CORRECTED DIMMABLE LED DRIVER | |
| Manufacturers | Unisonic Technologies | |
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UNISONIC TECHNOLOGIES CO., LTD
L8532
Preliminary
LINEAR INTEGRATED CIRCUIT
POWER FACTOR CORRECTED
DIMMABLE LED DRIVER
DESCRIPTION
The UTC L8532 is a switch mode power supply controller
intended for low to medium power single stage power factor (PF)
corrected LED Drivers. The device is designed to operate in
critical conduction mode (CrM) and is suitable for flyback as well
as buck topologies. Constant on time CrM operation is particularly
suited for isolated flyback LED applications as the control scheme
is straightforward and very high efficiency can be achieved even
at low power levels. These are important in LED lighting to
comply with regulatory requirements and meet overall system
luminous efficacy requirements. In CrM, the switching frequency
will vary with line and load and switching losses are low as
recovery losses in the output rectifier are negligible since the
current goes to zero prior to reactivating the main MOSFET
switch.
The device features a programmable on time limiter, zero
current detect sense block, gate driver, trans-conductance error
amplifier as well as all PWM control circuitry and protection
functions required to implement a CrM switch mode power
supply. Moreover, for high efficiency, the device features low
startup current enabling fast, low loss charging of the VCC
capacitor. The current sense protection threshold has been set at
500 mV to minimize power dissipation in the external sense
resistor. To support the environmental operation range of Solid
State Lighting, the device is specified across a wide junction
temperature range of -40°C ~125°C.
FEATURES
* Very Low 24μA Typical Startup Current
* Constant On Time PWM Control
* Cycle-by-Cycle Current Protection
* Low Current Sense Threshold of 500mV
* Low 2mA Typical Operating Current
* Source 500mA/Sink 800mA Totem Pole Gate Driver
* Reference Design for TRIAC and Trailing Edge Line Dimmers
* Wide Operating Temperature Range
* No Input Voltage Sensing Requirement
* Enable Function and Overvoltage Protection
SOP-8
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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L8532
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
MFP Voltage
MFP Current
VMFP
IMFP
-0.3~10
±10
V
mA
COMP Voltage
COMP Current
VControl
IControl
-0.3~6.5
-2~10
V
mA
Ct Voltage
Ct Current
VCt -0.3~6
ICt ±10
V
mA
CS Voltage
CS Current
VCS -0.3~6
ICS ±10
V
mA
ZCD Voltage
ZCD Current
VZCD
IZCD
-0.3~10
±10
V
mA
DRV Voltage
DRV Sink Current
VDRV
IDRV(sink)
-0.3~VCC
800
V
mA
DRV Source Current
Supply Voltage
IDRV(source)
VCC
500
-0.3~20
mA
V
Supply Current
Power Dissipation
(TA =70°C, 2.0 Oz Cu, 55 mm2 Printed Circuit Copper Clad)
ICC
PD
±20
450
mA
mW
Operating Junction Temperature Range
Maximum Junction Temperature
TJ
TJ(MAX)
-40~125
150
°C
°C
Storage Temperature Range
TSTG
-65~150
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. As mounted on a 40×40×1.5mm FR4 substrate with a single layer of 650 mm2 of 2 oz copper traces and
heat spreading area.
THERMAL DATA
PARAMETER
Junction to Ambient
SYMBOL
θJA
RATINGS
178
UNIT
°С/W
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for L8532 electronic component. |
| Information | Total 8 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ L8532.PDF Datasheet ] | |
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