Datasheet

TPS61181A
SLVSAN6A –FEBRUARY 2011– REVISED MARCH 2011 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
V
BAT
= 10.8 V, 0.1 μF at Cin, EN = Logic High, IFB current = 20 mA, IFB voltage = 500 mV, T
A
= –40°C to 85°C, typical
values are at T
A
= 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
OSCILLATOR
f
S
Oscillator frequency 0.9 1.0 1.2 MHz
D
max
Maximum duty cycle IFB = 0 V 94 %
D
min
Minimum duty cycle 7 %
OS, SC, OVP AND SS
I
LIM
N-Channel MOSFET current limit D = D
max
1.5 3 A
V
ovp
V
O
overvoltage threshold Measured on the V
O
pin 38 39 40 V
V
ovp_IFB
IFB overvoltage threshold Measured on the IFBx pin 15 17 20 V
V
sc
Short circuit detection threshold V
IN
-V
O
, V
O
ramp down 1.7 2.5 V
V
sc_dly
Short circuit detection delay during start up 32 ms
Fault OUTPUT
V
fault_high
Fault high voltage Measured as V
BAT
–V
Fault
0.1 V
V
fault_low
Fault low voltage Measured as V
BAT
–V
Fault
, sink 0.1mA, Vin 6 8 10 V
= 15 V
THERMAL SHUTDOWN
T
shutdown
Thermal shutdown threshold 160 °C
T
hysteresis
Thermal shutdown threshold hysteresis 15 °C
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