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UCC1806DW Datasheet

  • UCC1806DW

  • LOW-POWER, DUAL-OUTPUT, CURRENT-MODE PWM CONTROLLER

  • 21頁

  • TI

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UCC1806
UCC2806
UCC3806
SLUS272C 鈭?FEBRUARY 2000 鈭?REVISED JUNE 2003
LOW-POWER, DUAL OUTPUT,
CURRENT MODE PWM CONTROLLER
FEATURES
D
BiCMOS Version of UC3846 Family
D
1.4-mA Maximum Operating Current
D
100-碌A(chǔ) Maximum Startup Current
D
鹵0.5-A
Peak Output Current
D
125-ns Circuit Delay
D
Easier Parallelability
D
Improved Benefits of Current Mode Control
DESCRIPTION
The UCC3806 family of BiCMOS PWM controllers
offers exceptionally improved performance with a
familiar architecture. With the same block diagram
and pinout of the popular UC3846 series, the
UCC3806 line features increased switching
frequency capability while greatly reducing the
bias current used within the device. With a typical
startup current of 50
碌A(chǔ)
and a well defined voltage
threshold for turn-on, these devices are favored
for applications ranging from off-line power
supplies to battery operated portable equipment.
Dual high-current, MOSFET driving outputs and a
fast current sense loop further enhance device
versatility.
All the benefits of current mode control including
simpler loop closing, voltage feed-forward,
parallelability with current sharing, pulse-by-pulse
current limiting, and push/pull symmetry
correction are readily achievable with the
UCC3806 series.
These devices are available in multiple package
options for both through-hole and surface mount
applications; and in commercial, industrial, and
military temperature ranges.
The UCC3806 is specified for operation from
鈭?5擄C to 125擄C, the UCC2806 is specified for
operation from 鈭?0擄C to 85擄C, and the UCC3806
is specified for operation from 0擄C to 70擄C.
SIMPLIFIED APPLICATION DIAGRAM
+VIN
15
VIN
13
VC
UCC3806
2 VREF
INV 6
COMP 7
AOUT 11
BOUT 14
SHUT 15
DOWN
CS+ 4
GND
12
3
UCC3612
UC39431
+VOUT
8 CT
5 NI
1 CURLIM
10 SYNC
9 RT
CS鈭?/div>
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
錚?/div>
1999 鈭?2003, Texas Instruments Incorporated
www.ti.com
1

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