TPS92660
ZHCSB27 –APRIL 2013
www.ti.com.cn
ELECTRICAL CHARACTERISTICS
Unless otherwise specified V
IN
= 48 V, –40°C <T
A
= T
J
< 125°C .
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
REGULATOR (VCC)
V
CC
V
CC
Voltage 7.75 8.2 8.55 V
I
VCC
V
CC
current limit V
CC
= 0 14 20 27 mA
Rising threshold 6.4
V
CCUVLO
V
Falling threshold 6.1
I
Q
Quiescent current V
IN
= 80 V 2.2 mA
UVLO/DEVICE ENABLE (EN/UV)
V
EN
Device enable voltage threshold V
EN
increasing 1.14 1.2 1.26 V
V
EN_HYS
Enable input hysteresis 20 mV
I
EN
Enable source current V
EN
= 0 10 µA
ON/OFF TIMER/OVER VOLTAGE PROTECTION (RON, VO)
R
PD_RON
RON pull-down resistance 60 83 Ω
V
OV
VO pin overvoltage threshold 2.4 2.5 2.6 V
V
OV_HYS
VO pin overvoltage hysteresis 0.1 V
t
ON_DLY
RON pin to GATE delay 58 ns
t
OFF(min)
Minimum off-time V
CS
= 0 V 200 255 340 ns
t
ON(min)
Minimum on-time 80 120 180 ns
I
2
C LOGIC INTERFACE (SCL, SDA) (2.7V ≤ V
SVDD
≤ 5.5V)
V
IL
Low-level input voltage 0.2 × V
SVDD
V
V
IH
High-level input voltage 0.8 × V
SVDD
V
I
L
Logic input current –1 0 1 µA
f
SCL
SCL input frequency 100 200 kHz
V
OL
Low-level output voltage I
SDA
= 3 mA 0.2 0.38 V
I
L
Output leakage current V
SDA
= 5 V 1 µA
SWITCHER LED CURRENT SENSE (CS, COMP)
Switcher LED current reference
V
SW_REF
Non-programmed 196 202 209 mV
voltage
Switcher LED current reference ±40
∆ V
SW_REF
mV
voltage adjust range –40
I
CS
CS bias current 1 µA
g
M
CS amplifier transconductance 600 µA/V
V
CS_COMP
CS to COMP offset voltage 1.8 V
COMP source current 75 µA
I
COMP
COMP sink current 75 µA
HIGH SIDE SWITCH CURRENT LIMIT (VIN, SW)
High side switch current limit
V
SW_LIM
232 275 329 mV
(referenced from VIN)
t
LIM_OFF
Current limit OFF time 280 µS
Switch current sense leading edge
t
LEB
200 nS
blank time
4 Copyright © 2013, Texas Instruments Incorporated
评论0
最新资源