參數(shù)資料
型號： UCC3977TRPW
廠商： Texas Instruments, Inc.
英文描述： BALLAST/BACKLIGHT CONTROLLER/DRIVER|TSSOP|8PIN|PLASTIC
中文描述： 鎮(zhèn)流器/背光控制器/驅(qū)動器| TSSOP封裝| 8引腳|塑料
文件頁數(shù)： 5/28頁
文件大小： 433K
代理商： UCC3977TRPW
SLUS499A
–
NOVEMBER 2001
–
REVISED JANUARY 2002
5
www.ti.com
electrical characteristics V
DD
= 3 V to 13.5 V, T
A
= 0
°
C to 70
°
C for UCC3975/UCC3976/UCC3977,
T
A
=
–
40
°
C to 85
°
C for the UCC2975/UCC2976/UCC2977, T
A
= T
J
(unless otherwise noted)
mode select
PARAMETER
TEST CONDITIONS
MIN
2.45
TYP
2.50
MAX
2.65
UNITS
Shutdown threshold voltage
Restart threshold voltage
0.3
0.5
0.7
Open lamp detect enable threshold voltage
UCC2975
UCC2976
UCC2977
1.3
1.5
1.6
V
UCC3975
UCC3976
UCC3977
1.4
1.5
1.6
V
MODE pull-down current
200
250
300
mA
No lock threshold voltage
2.4
2.5
2.6
V
functional block diagram
The UCC397x family of controllers contain an error amplifier whose output is preconditioned at startup, a
precision window comparator used to form the VCO, and dual MOSFET drivers customized for half-bridge or
push-pull operation. The part includes a frequency lock retry circuit, low current shutdown, and open lamp fault
protection.
UDG
–
01053
Figure 4
OPEN/SD
+
2.5 V
+
0.5 V
+
1.5 V
S
Q
Q
R
SLEEP
PWRUP
SHUT DOWN
RESET
OPEN LAMP
PWRUP
FAULT
INIT
OSC
COMP
FB
+
FAULT
COUNTER
RESET
COUNT
FAULT
SLEEP
NO LOCK
S
Q
R
INIT
SLEEP
REF
UVLO
+
2.5 V
0.1 V
+
INIT
ERROR
AMPLIFIER
1.5 V
1.4 V
1.5 V
+
1.7 V
+
0.7 V
S
Q
R
1.75 V
D
Q
Q
CK
D
G
GND
OUTN/OUT2
OUTP/OUT1
VDD
SLEEP
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