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TS19451 PDF Datasheet - Taiwan Semiconductor

Part Number TS19451
Description AC/DC WLED Driver
Manufacturers Taiwan Semiconductor 
Logo Taiwan Semiconductor Logo 
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Preview ( 7 pages )
		
TS19451 datasheet, circuit
SOT-89
Pin Definition:
1. Drain
2. GND
3. VDD
TS19451
AC/DC WLED Driver with Internal MOSFET
Universal Switch Mode
General Description
The TS19451 is a PWM high efficiency LED driver control IC. It allows efficient operation of LED strings from
voltage source ranging up to 400VDC. It includes an internal high voltage switching MOSFET controlled with fixed
off-time of approximately 10.5µS.
The LED string is driven at constant current, thus providing constant light output and enhanced reliability. The
output current is internally fixed at 50mA. The peak current control scheme provides good regulation of the output
current throughout the universal AC line voltage range of 85~264VAC or DC input voltage of 20~400V
Features
Constant output current at 50mA
Universal 85~264VAC operation
Fixed off-time buck converter
Internal 475V power MOSFET
Typical Application Circuit
Application
Decorating LED lighting
Lower power lighting fixtures
Back light of flat panel displays
Ordering Information
Part No.
Package
Packing
TS19451CY RMG SOT-89
1Kpcs / 7” Reel
Note: “G” denotes for Halogen Free
Absolute Maximum Rating
Parameter
Symbol
Limit
Unit
Input Voltage Range
VIN to GND
~ +475
V
Supply Current
IDD 5 mA
Power Dissipation @ TA=25ºC
PD
1300
mW
Operating Ambient Temperature
Storage Temperature Range
Junction Temperature Range
Thermal Resistance – Junction to Ambient
TOPR
TSTG
TJ
RθJA
-40 to +85
-65 to +150
-40 to +150
128
ºC
oC
oC
oC/W
Note: Stresses beyond those listed under ”Absolute Maximum Ratings” may cause permanent damage to the
device. These are stress rating only, and functional operation of the device at these or any other conditions beyond
those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
1/7 Version: B11

1 page
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TS19451 pdf, schematic
TS19451
AC/DC WLED Driver with Internal MOSFET
Universal Switch Mode
Electrical Specifications (Ta = 25oC, VDRAIN= 50V, unless otherwise noted)
Function Parameter
Internal Regulator
Symbol
Test Conditions
Min Typ Max Units
Internally Regulated Voltage
VDD
-- 7.5 --
V
Drain Supply Voltage
VDRAIN
-- 20 --
V
Undervoltage Lockout Threshold
UVLO
4.0 -- -- V
Undervoltage Lockout Hysteresis
UVLO
-- 200 -- mV
Supply Current
Output (Drain)
IDD VDD(EXT)=8.5V, VDRAIN=40V -- 200 350 µA
Breakdown Voltage
VBR
475 -- -- V
On Resistance
RDSON
IDRAIN=50mA
-- -- 210
Output Capacitance
CDRAIN
VDRAIN=400V
-- 1.0 5.0 pF
MOSFET Saturation current
Current Sense Comparator
ISAT
100 150 -- mA
Threshold Current
ITH
49 -- 63 mA
Leading edge Blanking delay
TBLANK
200 300 400 nS
Minimum Turn On-Time
Off-Time Generator
TON(MIN)
-- -- 650 nS
Turn On-Time
TOFF
8 10.5 13 µS
Note 1: The specification which apply over the full operating ambient temperature range of -40ºC<TA<+85ºC
2: Guaranteed by design
Block Diagram
2/7 Version: B11

2 Page
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TS19451 equivalent
TS19451
AC/DC WLED Driver with Internal MOSFET
Universal Switch Mode
Electrical Characteristics Curve
Figure 1. Threshold Current vs. Junction
Temperature
Figure 2. Drain Breakdown Voltage vs. Output
Current
Figure 3. OFF-Time vs. Junction Temperature Figure 4. Drain Capacitance vs. Drain Voltage
Figure 5. On-Resistance vs. Junction
Temperature
Figure 6. Drain Current vs. Drain Voltage
5/7 Version: B11

5 Page





Information Total 7 Pages
Download[ TS19451.PDF Datasheet ]

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