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
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Competitive bill of material design
Built-in Power MOSFET
Constant current accuracy <±3%
V
CC
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
●
●
GU10 light bulb
SOP-8
TYPICAL APPLICATOIN CIRCUIT
No
Notes:
MSL 3 (Moisture Sensitivity Level) per J-STD-020
tR
1
eco
mm
en
Pin Definition:
1. GND
2. V
CC
3. CS
4. CS
5. DRAIN
6. DRAIN
7. HV
8. GND
de
Version: B1605
Candle light bulb
The Product is Covered by Patents and/or Pending Patent Applications
d
TS19751
Taiwan Semiconductor
ABSOLUTE MAXIMUM RATINGS
(T
A
= 25°C unless otherwise specified)
(Note 1)
PARAMETER
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 @ T
A
=25 °C
ESD Rating (Human Body Mode)
ESD Rating (Machine Mode)
(Note 2)
(Note 2)
SYMBOL
V
CC
V
CS
V
HV
T
OPR
T
J
T
STG
T
LEAD
P
D
HBM
MM
(Note 3)
LIMIT
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
PARAMETER
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SYMBOL
R
ӨJC
R
ӨJA
d
LIMIT
50
208
UNIT
o
o
Thermal Resistance - Junction to Case
Thermal Resistance - Junction to Ambient
C/W
C/W
RECOMMENDED OPERATING CONDITION
(T
A
= 25°C unless otherwise specified)
(Note 4)
PARAMETER
Power Supply Pin
CS Voltage to GND
HV Voltage to GND
SYMBOL
V
CC
V
CS
V
HV
T
J
T
OPA
LIMIT
19
-0.3 to 5
-0.3 to 500
-40 to +150
-40 to +85
UNIT
V
V
V
°C
°C
Operating Junction Temperature Range
Operating Ambient Temperature Range
PARAMETER
Supply Voltage
Start-up Current
Operating Current
UVLO(off)
UVLO(on)
No
ELECTRICAL SPECIFICATIONS
(T
A
= 25°C unless otherwise specified)
SYMBOL
V
CC(ST)
I
OPA
V
UVLO(off)
V
UVLO(on)
V
VCC
V
FB
V
OCP
LEB
t
CONDITION
V
CC
= V
UVLO(on)
-1V
With 1nF load on out pin
MIN
--
--
7
16
17
0.194
--
--
--
f
STR
3
TYP
45
2
8
17.5
19
0.2
0.5
400
100
4.5
MAX
--
--
9
19
21
0.206
--
--
--
6
UNIT
μA
mA
V
V
V
V
V
ns
ns
kHz
VCC Clamp Voltage
Voltage Feedback
Feedback Reference Voltage
Current Sensing
CS Limit Voltage
Leading-Edge Blanking Time
Delay to Output
Switching Frequency
Start Frequency
tR
e co
2
mm
en
Version: B1605
The Product is Covered by Patents and/or Pending Patent Applications
TS19751
Taiwan Semiconductor
ELECTRICAL SPECIFICATIONS
(T
A
= 25°C unless otherwise specified)
PARAMETER
MOSFET Section
Drain-Source Breakdown
Voltage
Drain-Source On-Resistance
Thermal Section
(Note 5, 6)
SYMBOL
CONDITION
TS19751ACS
TS19751BCS
TS19751ACS
TS19751BCS
MIN
500
650
--
--
--
--
TYP
--
--
--
--
150
120
MAX
--
--
30
17
--
--
UNIT
V
V
Ω
Ω
°C
°C
BV
DS
R
DS(ON)
Thermal Shutdown
Thermal Shutdown Release
3.
4.
5.
6.
Thermal Resistance is specified with the component mounted on a low effective thermal conductivity test board in free air at
T
A
=25°C.
Guaranteed by design.
Auto Recovery Type.
The device is not guaranteed to function outside its operating conditions.
ORDERING INFORMATION
PART NO.
PACKAGE
TS19751ACS RLG
TS19751BCS RLG
tR
SOP-8
SOP-8
No
3
The Product is Covered by Patents and/or Pending Patent Applications
e co
mm
PACKING
2,500pcs / 13”Reel
2,500pcs / 13”Reel
en
Version: B1605
de
Note:
1.
Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for
stress ratings. 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
remain possibility to affect device reliability.
2. Devices are ESD sensitive. Handing precaution recommended.
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TS19751
Taiwan Semiconductor
FUNCTION BLOCK
PIN DESCRIPTION
PIN NO.
1,8
2
3,4
5,6
7
NAME
GND
VCC
FUNCTION
Ground return for all internal circuitry.
Input current sense pin.
HV start up pin
Power supply pin for all internal circuitry.
CS
DRAIN
HV
No
4
The Product is Covered by Patents and/or Pending Patent Applications
tR
e co
Drain of internal HV MOS.
mm
Version: B1605
en
de
d
TS19751
Taiwan Semiconductor
APPLICATION INFORMATION
Start-up Current
The typical start-up current is around 45μA. The TS19751 has a built-in HV start-up circuit that avoids the need for
a start-up resistor.
Under Voltage Lockout (UVLO)
A hysteresis UVLO comparator is implemented in TS19751. The turn-on and turn-off thresholds level are fixed at
17.5V and 8V respectively. This hysteresis shown in
Fig.1
ensures that the start-up capacitor will be adequate to
supply the chip during start-up. For quick start-up of the LED driver, the start-up resistor should be matched with
the start-up capacitor.
Fig.1
Leading-Edge Blanking (LEB)
fault trigger, a 400ns leading-edge blanking time is built in. Conventional RC filtering can therefore be omitted.
During this blanking period, the current-limit comparator is disabled and cannot switch off the gate driver.
VCC is clamped to 19V by an internal clamping circuit to guarantee IC normal operation.
The TS19751 has built-in cycle by cycle over current protection function on CS pin. As the CS pin voltage is larger
than V
OCP
(0.5V), the gate output will be turned off immediately to avoid the driver board to be burned out.
Open load Protection (OLP)
To prevent the LED driver from being damaged, the TS19751 has an implemented OLP function. The open load
protection will shut the gate driver when minimum off time keep shorter than 4.5uS.
Over Temperature Protection (OTP)
Internal 165℃ comparator will trigger temperature protection (OTP). OTP will shut down system, until internal
temperature back to 120℃.
No
tR
Over Current Protection (OCP)
e co
5
VCC Over Voltage Clamp
mm
Each time the power MOSFET is switched on, a turn-on spike will inevitably occur at the sense resistor. To avoid
en
de
Version: B1605
The Product is Covered by Patents and/or Pending Patent Applications
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