Datasheet

TPS92310
SNVS792 –FEBRUARY 2012 www.ti.com
Electrical Characteristics (continued)
V
CC
= 18V unless otherwise indicated. Typicals and limits appearing in plain type apply for T
A
= T
J
= +25°C. Limits appearing
in boldface type apply over the full Operating Temperature Range. Data sheet minimum and maximum specification limits
are specified by design, test or statistical analysis.
Symbol Parameter Conditions Min Typ Max Units
COMPENSATION (COMP)
I
COMP-SOURCE
Internal reference current V
COMP
= 2.0V, V
ISNS
= 0V, Measure at 27 µA
for primary side current COMP pin
regulation
gm
ISNS
ISNS error amp Δ V
ISNS
to Δ I
COMP
@ V
COMP
= 2.5V 100 µmho
transconductance
V
COMP
COMP operating range 2.0 3.5 V
DELAY CONTROL (DLY)
V
DLY
DLY pin internal reference 1.21 1.23 1.26 V
voltage
I
DLY-MAX
DLY source current V
DLY
= 0V 250 µA
CURRENT SENSE (ISNS)
V
ISNS-OCP
Over Current Detection Non isolation mode 0.59 0.64 0.68 V
Threshold
V
ISNS-OCP
Over Current Detection Isolation mode 3.2 3.4 3.6 V
Threshold
I
ISNS
Current Sense Bias V
ISNS
= 5V -1 1 µA
Current
T
OCP
Over current Detection Measure GATE pulse width at V
ISNS
= 5V 210 ns
Propagation Delay
GATE DRIVER (GATE)
V
GATE-H
GATE high drive voltage I
GATE
= 50mA source 8 9.4 11.86 V
V
GATE-L
GATE low drive voltage I
GATE
= 50mA sink 28 80 167 mV
T
ON-MIN
Minimum ON time 360 540 720 ns
T
OFF-MAX
Maximum OFF time ZCD = GND 50 72 94 µs
t
GATE-RISE
Rise time C
LOAD
= 1nF 110 ns
t
GATE-FALL
Fall time C
LOAD
= 1nF 20 ns
THERMAL SHUTDOWN
TSD Thermal shutdown 165 °C
temperature
(1)
Thermal Shutdown 20 °C
hysteresis
(1) Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T
J
= 165°C (typ.) and
disengages at T
J
= 145°C (typ).
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