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TS19376CY5 RMG

P1-P3P4-P6P7-P8
TS19376
1A Step-down High Brightness LED Driver
1/8
Version: A12
SO
T
-
89
-
5L
General Description
The TS19376 is a continuous conduction mode inductive step-down converter, designed for driving single or
multiple series connected LED efficiently from a voltage source higher than the total LED chain voltage. The
device operates from an input supply between 8V and 32V and provides an externally adjustable output current of
up to 1A. Depending upon the supply voltage and external components, the TS19376 can provide more than 15
watts of output power. The TS19376 includes the power switch and a high-side output current sensing circuit,
which uses an external resistor to set the nominal average output current, and a dedicated DIM input accepts a
wide range of pulsed dimming. Applying a voltage of 0.3V or lower to the DIM pin turns the output off and switches
the device into a low current standby state
Features
● Wide input voltage range: 8V to 32V
● Up to 1A output current
● 5000:1 Dimming
● Single pin on/off and brightness control using PWM
● Up to 1MHz switching frequency
● Typical 5% output current accuracy
● High-Side Current Sense
● Hysteretic Control: No Compensation
● Adjustable Constant LED Current
Application
● White LED Backlighting
● High Power LED Application
● LED Lighting Equipment
Ordering Information
Part No. Package Packing
TS19376CY5 RMG
SOT-89-5L
1Kpcs / 7” Reel
Note: “G” denotes Halogen Free Product.
Absolute Maximum Rating
Parameter Symbol Limit Unit
Supply Voltage V
IN
-0.3 to 40 V
Driver output Voltage SW -0.3 to 40 V
Current sense input (Respect to V
IN
) CSN +0.3 to (-6.0) V
Logic level dimming input DIM -0.3 to +6 V
Switch output current I
SW
1.0 A
Power Dissipation P
DMAX
1.5 W
Operation Junction Temperature Range T
J
-40 to 125 °C
Storage Temperature T
STG
-55 to 150 °C
Thermal Resistance from Junction to case θ
JC
15 °C/W
Thermal Resistance from Junction to ambient θ
JA
50 °C/W
Note: θ
JA
is measured with the PCB copper area (need connect to Exposed Pad) of approximately 1 in
2
(Multi-layer).
Pin
Definition
:
1. SW
2. GND
3. DIM
4. CSN
5. VIN
TS19376
1A Step-down High Brightness LED Driver
2/8
Version: A12
Electrical Specifications
(V
IN
=12V, T
A
=25
o
C, unless otherwise noted)
Characteristics Symbol Conditions Min Typ Max
Units
Input voltage V
IN
8 -- 32 V
Under voltage lock out V
UVLO
V
IN
rising -- 7 -- V
UVLO Hysterisis V
UVLO_hys
V
IN
falling -- 1000
-- mV
Max. Switching Frequency F
SW
-- -- 1 MH
Z
Current Sense
Mean current sense threshold voltage V
CSN
V
IN
–V
CSN
120 130 140 mV
Sense threshold hysteresis V
CSN_hys
-- ±15 -- %
CSN Pin Input Current I
CSN
V
IN
–V
CSN
= 50mV -- 0.5 -- µA
DIM Input
DIM input voltage High V
DIM_H
2.0 -- -- V
DIM input voltage Low V
DIM_L
-- -- 0.3 V
Max. DIM Frequency f
DIM
f
OSC
= 500kHz -- -- 50 kH
Z
Duty cycle range of low frequency dimming
D
PWM_LF
f
DIM
= 100Hz 0.02%
-- 1
Brightness control range -- 5000:1
--
Duty cycle range of high frequency dimming
D
PWM_HF
f
DIM
= 20kHz 4% -- 1
Brightness control range -- 25:1
--
DIM pull up resistor to Internal
supply voltage
R
DIM
-- 300 -- KΩ
DIM input leakage low I
DIM_L
V
DIM
= 0 -- 70 -- µA
Output Switch
Saturation Voltage V
SAT
I
OUT
= 0.3A -- 0.8 1.0 V
Saturation Voltage V
SAT
I
OUT
= 0.8A -- 1.0 1.2 V
Continuous SW Current I
SWmean
-- -- 1.0 A
SW Leakage Current I
LEAK
-- 0.5 5 µA
Thermal Shutdown
Thermal Shutdown Threshold T
SD
-- 150 -- °C
Thermal Shutdown hysteresis T
SD-hys
-- 35 -- °C
TS19376
1A Step-down High Brightness LED Driver
3/8
Version: A12
Block Diagram
V25
GATE
DRIVER
Driver
+
-
+
-
DIM
BUFFER
VIN
CSN
DIM
2.5V
UVLO
COMPARATOR
CS
COMPARATOR
GND
SW
70µ
130mV
Pin Function Description:
Pin
Name
Description
1 SW Switch Output. SW is the output of the internal driver switch.
2 GND Signal and power ground. Connect directly to ground plane.
3 DIM
Logic level dimming input. Drive DIM low to turn off the current regulator.
Drive DIM high to enable the current regulator.
4 CSN Current sense input
5 VIN Input Supply Pin. Must be locally bypassed.
Typical Application Circuit
I
LED
=
A325.0
4.0
130.0
R
V
S
CSN
==
P1-P3P4-P6P7-P8

TS19376CY5 RMG

Mfr. #:
Buy TS19376CY5 RMG
Manufacturer:
Taiwan Semiconductor
Description:
LED Lighting Drivers 1A Step-down High Brightness LED Driver
Lifecycle:
New from this manufacturer.
Delivery:
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