Datasheet

TPS51123A
www.ti.com SLUSAA6C –APRIL 2011–REVISED SEPTEMBER 2012
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER CONDITIONS MIN TYP MAX UNIT
PROTECTION: CURRENT SENSE
I
TRIP
TRIPx source current V
TRIPx
= 920 mV, T
A
= 25°C 9.4 10 10.6 μA
TRIPx current temperature
TC
ITRIP
On the basis of 25°C
(2)
4500 ppm/°C
coefficient
((V
TRIPx-GND
/9)-24 mV -V
GND-LLx
) voltage, V
TRIPx-
V
OCLoff
OCP comparator offset -8 0 8
GND
= 920 mV
V
OCL(max)
Maximum OCL setting V
TRIPx
= 5 V 185 205 225 mV
Zero cross detection
V
ZC
V
GND-LLx
voltage -5 0 5
comparator offset
V
TRIP
Current limit threshold V
TRIPx-GND
voltage
(2)
0.515 2 V
PROTECTION: UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
V
OVP
OVP trip threshold OVP detect 110% 115% 120%
t
OVPDEL
OVP prop delay 2 μs
UVP detect 55% 60% 65%
V
UVP
Output UVP trip threshold
Hysteresis 10%
t
UVPDEL
Output UVP prop delay 20 32 40 μs
t
UVPEN
Output UVP enable delay 1.4 2 2.6 ms
UNDERVOLTAGE LOCKOUT (UVLO)
Wake up 4.1 4.2 4.3
V
UVVREG5
VREG5 UVLO threshold
Hysteresis 0.38 0.43 0.48 V
V
UVVREG3
VREG3 UVLO threshold Shutdown
(2)
VO2-1
THERMAL SHUTDOWN
Shutdown temperature
(2)
150
T
SDN
Thermal shutdown threshold °C
Hysteresis
(2)
10
(2) Ensured by design. Not production tested.
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