Datasheet
TPS92311
SNVS811B –MAY 2012–REVISED MAY 2013
www.ti.com
Electrical Characteristics
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
(1)
Max Units
SUPPLY VOLTAGE INPUT (VCC)
V
CC-UVLO
VCC Turn on 23.4 / 23 25.6 27.8 / 29 V
threshold
VCCTurn off 11.1 / 10.4 13 14.7 / 15.7 V
threshold
Hysteresis 12.6
I
STARTUP
Startup Current V
CC
= V
CC-UVLO
–3.0V 10 12.5 14.75 µA
I
VCC
Operating supply Not switching 0.9 1.2 1.5 mA
current
65kHz switching 2 mA
ZERO CROSS DETECT (ZCD)
I
ZCD
ZCD bais current V
ZCD
= 5V 0.1 1 uA
V
ZCD-OVP
ZCD over-voltage 4.1 4.3 4.5 V
threshold
T
OVP
Over voltage de- 3 cycle
bounce time
V
ZCD-ARM
ZCD Arming V
ZCD
= Increasing 1.16 1.24 1.3 V
threshold
V
ZCD-TRIG
ZCD Trigger V
ZCD
= Decreasing 0.48 0.6 0.77 V
threshold
V
ZCD-HYS
ZCD Hysteresis V
ZCD-ARM
-V
ZCD-TRIG
0.64 V
COMPENSATION (COMP)
I
COMP-
Internal reference V
COMP
= 2.0V, V
ISNS
= 0V, Measure at 27 µA
SOURCE
current for primary COMP pin
side current
regulation
gm
ISNS
ISNS error amp Δ V
ISNS
to Δ I
COMP
@ V
COMP
= 2.0V 100 µmho
trans-conductance
V
COMP
COMP operating 2.0 3.5 V
range
DELAY CONTROL (DLY)
V
DLY
DLY pin internal 1.21 1.23 1.26 V
reference voltage
I
DLY-MAX
DLY source current V
DLY
= 0V 250 µA
CURRENT SENSE (ISNS)
V
ISNS-OCP
Over Current Non isolation mode 0.56 0.61 0.68 V
Detection
Threshold
V
ISNS-OCP
Over Current Isolation mode 3.2 3.4 3.6 V
Detection
Threshold
I
ISNS
Current Sense V
ISNS
= 5V -1 1 µA
Bias Current
T
OCP
Over current R
SNS
= 1K, Measure ISNS pin pulse width 210 ns
Detection with V
SW
= 6V
Propagation Delay
OUTPUT MOSFET (SW FET)
V
BVDS
SW to ISNS 600 660 V
breakdown voltage
(1) Typical numbers are at 25°C and represent the most likely norm.
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