Document
TS19751
Taiwan Semiconductor
Single-Stage Buck Current Control LED Driver with High Voltage MOSFET Integrated
DESCRIPTION
The TS19751 is a high performance LED driver which accuracy constant current PWM controller with high voltage power MOSFET integrated. It achieves high accuracy by peak current mode. The device provide high efficiency along with a number of key built-in protection features while minimizing the external component count, simplifying EMI design and lowering the total bill of material cost. TS19751 also achieving excellent line and load regulation. Pulse-by-pulse waveform analysis allows for a loop response that is much faster than traditional solutions, resulting in improved dynamic load response. The built-in current limit function enables optimized transformer design in universal off-line applications over a wide input voltage range.
FEATURES
● Competitive bill of material design ● Built-in Power MOSFET ● Constant current accuracy <±3% ● VCC Over Voltage Clamp 19V ● Peak Current Mode Control ● LED Open Protection(OLP) ● Over Current Protection (OCP) ● Internal Over Thermal Protection (OTP) ● Fast start-up time < 500ms
APPLICATION
● Candle light bulb ● GU10 light bulb
SOP-8
Notes: MSL 3 (Moisture Sensitivity Level) per J-STD-020
TYPICAL APPLICATOIN CIRCUIT
Pin Definition: 1. GND 2. VCC 3. CS 4. CS 5. DRAIN 6. DRAIN 7. HV 8. GND
1 The Product is Covered by Patents and/or Pending Patent Applications
Version: B1605
TS19751
Taiwan Semiconductor
ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise specified) (Note 1)
PARAMETER
SYMBOL
LIMIT
Power Supply Pin CS Voltage to GND HV Voltage to GND Operating Temperature Range Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering 10 sec) Power Dissipation @ TA=25 °C ESD Rating (Human Body Mode) (Note 2) ESD Rating (Machine Mode) (Note 2)
VCC VCS VHV TOPR TJ TSTG TLEAD PD HBM MM
40 -0.3 to 5.5 -0.3 to 500 -40 to +105 -40 to +150 -65 to +150
260 0.6 2 200
UNIT
V V V °C °C °C °C W kV V
THERMAL PERFORMANCE (Note 3)
PARAMETER Thermal Resistance - Junction to Case Thermal Resistance - Junction to Ambient
SYMBOL RӨJC RӨJA
LIMIT 50 208
UNIT oC/W oC/W
RECOMMENDED OPERATING CONDITION (TA = 25°C unless otherwise specified) (Note 4)
PARAMETER
SYMBOL
LIMIT
UNIT
Power Supply Pin CS Voltage to GND HV Voltage to GND Operating Junction Temperature Range Operating Ambient Temperature Range
VCC VCS VHV TJ TOPA
19 -0.3 to 5 -0.3 to 500 -40 to +150 -40 to +85
V V V °C °C
ELECTRICAL SPECIFICATIONS (TA = 25°C unless otherwise specified)
PARAMETER
SYMBOL
CONDITION
MIN
Supply Voltage
Start-up Current Operating Current UVLO(off) UVLO(on) VCC Clamp Voltage Voltage Feedback
VCC(ST) IOPA
VUVLO(off) VUVLO(on)
VVCC
VCC= VUVLO(on) -1V With 1nF load on out pin
--7 16 17
Feedback Reference Voltage Current Sensing
VFB
0.194
CS Limit Voltage Leading-Edge Blanking Time Delay to Output
VOCP LEBt
----
Switching Frequency
Start Frequency
fSTR
3
TYP
45 2 8.