TS2581 Datasheet, PDF (2/7 Pages) Taiwan Semiconductor Company, Ltd – PWM Controller

TS2581
PWM Controller
Electrical Specifications (Ta = 25^oC unless otherwise noted, V_IN=12V)
Characteristics
Symbol
Conditions
Feedback Voltage
Under Voltage Lockout
UVLO Hysteresis
V_FB
U_VLO
-
I_OUT=10mA
Falling
OVP detect voltage
V_OVP
Internal define
Line Regulation
REG_LINE V_IN=10 ~ 40V, I_OUT=10mA
Load Regulation
REG_LOAD I_OUT=0~3A, R_SENSE = 33mΩ
Quiescent Current
I_CCQ
V_FB = 1.5V, force driver off.
Oscillator frequency
F_OSC
I_OUT = 0.5A
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
Force driver on V_FB = 0.6V
DC
Force driver off V_FB = 1.5V
Sense Voltage
VCC-V_SENSE
EN/CT pin logic input threshold
V_EN1
Shutdown mode
voltage
V_CT
Auto restart, VFB<0.4V
Thermal shutdown Temp
T_SD
Thermal
Shutdown Hysteresis
T_SH
Block Diagram
EN/CT
CURRENT
SOURCE
BIAS
1.23V
REFERENCE
2.5 V
REGULATOR
START-UP and
Auto restart control
Min. Typ. Max. Units
0.98 1 1.02 V
-
6
-
V
- 0.8 -
V
1.07 1.1 1.13 V
- 0.5 1 %
- 30 50 mV
-
3
6 mA
70 100 130 KHz
- 100 -
%
-
0
-
%
- 110 - mV
-
- 0.4 V
0.5 - 1.5 V
- 160 - °C
- 45 - °C
VCC
FB
OVP
1.00V
+
AMP
_
1.10V
0.4V
OSC.
+
COMP.
_
AMP
+
OVP
+
AMP
_
SCP
Current _{110 mV}
limit
COMP.
+
CONTROL
+
DRIVER
Thermal
Line
Shutdown Compensation
VSENSE
VGATE
GATE
GND
Pin Function Description
Name
Description
EN/CT Shutdown and auto restart control pin
GND GND pin
V_GATE
V_CC
GATE
Driver gate clamping pin. The pin must connect a 1uF capacitor to VIN
Operating voltage input
Switch pin. Connect external inductor and diode here
V_SENSE
OVP
Voltage Sense input
Over voltage detect pin
FB
Feedback pin
2/7
Version: A11