TS19453 Datasheet, PDF (2/7 Pages) Taiwan Semiconductor Company, Ltd – AC/DC Programmable Current WLED Driver

Preliminary
TS19453
AC/DC Programmable Current WLED Driver
w/PWM Dimming Control
Electrical Specifications (Ta = 25^oC, V_DRAIN= 50V, unless otherwise noted)
Function Parameter
Symbol
Test Conditions
Min Typ Max Units
Internal Regulator
Internally Regulated Voltage
V_DD
--
7.5
--
V
Drain Supply Voltage
V_DRAIN
20
--
400
V
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
UVLO
∆UVLO
V_DD rising
V_DD falling
4.8
--
--
V
--
200
--
mV
Supply Current
I_DD
V_DD(EXT)=8.0V
--
--
500 µA
Output (Drain)
Breakdown Voltage
On Resistance
V_BR
R_DSON
Note 1
I_DRAIN=50mA
475
--
--
V
--
--
200
Ω
MOSFET Saturation current
I_SAT
100 150
--
mA
Current Sense Comparator
Threshold Voltage
V_TH
Note 1
0.43
--
0.53
V
Leading edge Blanking delay
T_BLANK
Note 1,2
200 300 400 nS
Minimum Turn On-Time
T_ON(min)
--
--
650 nS
Off-Time Generator
Turn On-Time
PWMD
T_OFF
8
12
18
µS
PWMD Input Voltage
V_PWMD
High voltage
Low voltage
2.0
--
--
V
--
--
0.8
PWMD Pull Down Resistance
R_PWMD
VPWMD=5V
100
--
300
Ω
Note 1: The specification which apply over the full operating ambient temperature range of -40ºC<T_A<+85ºC
2: Guaranteed by design
Block Diagram
2/7
Version: Preliminary