UCC28730
ZHCSDC4 –FEBRUARY 2015
www.ti.com.cn
6.5 Electrical Characteristics
over operating free-air temperature range, V
VDD
= 25 V, HV = open, R
CBC
= open, T
A
= -40°C to 125°C, T
J
= T
A
(unless
otherwise noted)
PARAMETER TEST CONDITION MIN TYP MAX UNIT
High-Voltage Start-Up
I
HV
Start-up current out of VDD V
HV
= 100 V, V
VDD
= 0 V, start state 100 250 500 µA
I
HVLKG25
Leakage current into HV V
HV
= 400 V, run state, T
J
= 25°C 0.01 0.5 µA
Bias Supply Input Current
I
RUN
Supply current, run Run state, I
DRV
= 0 A 2.1 2.65 mA
I
WAIT
Supply current, wait Wait state, I
DRV
= 0 A, V
VDD
= 20 V 52 75 µA
I
START
Supply current, start Start state, I
DRV
= 0 A, V
VDD
= 18 V, 18 30 µA
I
HV
= 0 A
I
FAULT
Supply current, fault Fault state, I
DRV
= 0 A 54 75 µA
Under-Voltage Lockout
V
VDD(on)
VDD turn-on threshold V
VDD
low to high 17.5 21 23 V
V
VDD(off)
VDD turn-off threshold V
VDD
high to low 7.3 7.7 8.1 V
VS Input and Wake-Up Monitor
V
VSR
Regulating level
(1)
Measured at no-load condition, T
J
= 4.00 4.04 4.08 V
(1)
25°C
V
VSNC
Negative clamp level below GND I
VSLS
= –300 µA 190 250 325 mV
I
VSB
Input bias current V
VS
= 4 V -0.25 0 0.25 µA
V
WU(high)
Wake-up threshold at VS, high
(2)
VS pin rising 2 V
(2)
V
WU(low)
Wake-up threshold at VS, low VS pin rising 15 57 105 mV
CS Input
V
CST(max)
CS maximum threshold voltage
(3)
V
VS
= 3.7 V 710 740 770 mV
(3)
V
CST(min)
CS minimum threshold voltage V
VS
= 4.35 V 230 249 270 mV
K
AM
AM control ratio, V
CST(max)
/ 2.75 2.99 3.20 V/V
V
CST(min)
V
CCR
Constant-current regulation factor 310 319 329 mV
K
LC
Line compensation current ratio, I
VSLS
= –300 µA 24 25.3 28 A/A
I
VSLS
/ current out of CS pin
Driver
I
DRS
DRV source current V
DRV
= 8 V, V
VDD
= 9 V 20 29 35 mA
R
DRVLS
DRV low-side drive resistance I
DRV
= 10 mA 6 12 Ω
V
DRCL
DRV clamp voltage V
VDD
= 35 V 13 14.5 16 V
R
DRVSS
DRV pull-down in start state 150 190 230 kΩ
(1) The regulating level and OV threshold at VS decrease with increasing temperature by 1 mV/°C. This compensation over temperature is
included to reduce the variances in power supply output regulation and over-voltage detection with respect to the external output
rectifier.
(2) Designed for accuracy within ±10% of typical value.
(3) These threshold voltages represent average levels. This device automatically varies the current sense thresholds to improve EMI
performance.
8 Copyright © 2015, Texas Instruments Incorporated
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