UCC25705-Q1 MODULATOR Datasheet

UCC25705-Q1 Datasheet, PDF, Equivalent


Part Number

UCC25705-Q1

Description

HIGH-SPEED VOLTAGE MODE PULSE WIDTH MODULATOR

Manufacture

etcTI

Total Page 18 Pages
Datasheet
Download UCC25705-Q1 Datasheet


UCC25705-Q1
UCC25705-Q1, UCC25706-Q1
www.ti.com
HIGH-SPEED VOLTAGE MODE PULSE WIDTH MODULATOR
Check for Samples: UCC25705-Q1, UCC25706-Q1
SLUSAI1 MAY 2011
FEATURES
1
Qualified for Automotive Applications
Greater Than 4-MHz Operation
Integrated Oscillator / Voltage Feed Forward
Compensation
• >4:1 Input Voltage Range
25-ns Current Limit Delay
Programmable Maximum Duty Cycle Clamp
Optocoupler Interface
50-µA Start-Up Current
4.2-mA Operating Current at 1 MHz
Latch-Up Exceeds 100mA per JESD78 Class I
Smallest Footprint of the 8-pin MSOP
Package Minimizes Board Area and Height
D PACKAGE
(TOP VIEW)
ILIM
FB
VFF
DISCH
1
2
3
4
8 VDD
7 OUT
6 GND
5 RC
DESCRIPTION
The UCC25705-Q1 and UCC25706-Q1 devices are 8-pin voltage mode primary side controllers with fast
over-current protection. These devices are used as core high-speed building blocks in high performance isolated
and non-isolated power converters.
UCC25705-Q1/UCC25706-Q1 devices feature a high speed oscillator with integrated feed-forward compensation
for improved converter performance. A typical current sense to output delay time of 25 ns provides fast response
to overload conditions. The IC also provides an accurate programmable maximum duty cycle clamp for increased
protection which can also be disabled for the oscillator to run at maximum possible duty cycle.
Two UVLO options are offered. The UCC25705-Q1 with lower turn-on voltage is intended for dc-to-dc converters
while the higher turn-on voltage and the wider UVLO range of the UCC25706-Q1 is better suited for offline
applications.
The UCC2570x-Q1 family is offered in an 8-pin SOIC (D) package.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated

UCC25705-Q1
UCC25705-Q1, UCC25706-Q1
SLUSAI1 MAY 2011
Figure 1. TYPICAL APPLICATION SCHEMATIC
++
VOUT
V --
IN
--
VDD 8
4 DISCH
FB 2
5 RC
3 VFF
OUT 7
6 GND ILIM 1
MODE =1
UCC2570x-Q1
TPS2829
FET DRIVER
SOFT
START
CIRCUIT
www.ti.com
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature (unless otherwise noted)(1)(2)
Supply voltage
Input voltage (VFF,RC,ILIM)
Input voltage (FB)
Input current (DISCH)
Output current (OUT) dc
Storage temperature, Tstg
Junction temperature, TJ
Lead temperature (soldering, 10 sec)
VALUE
15
7
15
1
±20
65 to 150
55 to 150
300
UNIT
V
V
V
mA
mA
°C
°C
°C
(1) Stresses beyond those listed under absolute maximum ratingsmay cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditionsis not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to GND. Currents are positive into, negative out of the specified terminal. Consult ti.com/packaging for more
information.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
TA Operating ambient temperature
VALUE
40 to 105
UNIT
°C
TA
-40°C to 125°C
-40°C to 125°C
ORDERING INFORMATION TABLE
PACKAGE
ORDERABLE PART NUMBER
SOIC-8 D
SOIC-8 D
Reel of 2500
Reel of 2500
UCC25706QDRQ1
UCC25705QDRQ1
TOP-SIDE
MARKING
25706Q
Preview
2 Copyright © 2011, Texas Instruments Incorporated


Features UCC25705-Q1, UCC25706-Q1 www.ti.com HI GH-SPEED VOLTAGE MODE PULSE WIDTH MODUL ATOR Check for Samples: UCC25705-Q1, UC C25706-Q1 SLUSAI1 – MAY 2011 FEATUR ES 1 • Qualified for Automotive Appli cations • Greater Than 4-MHz Operatio n • Integrated Oscillator / Voltage F eed Forward Compensation • >4:1 Input Voltage Range • 25-ns Current Limit Delay • Programmable Maximum Duty Cyc le Clamp • Optocoupler Interface • 50-µA Start-Up Current • 4.2-mA Oper ating Current at 1 MHz • Latch-Up Exc eeds 100mA per JESD78 Class I • Smal lest Footprint of the 8-pin MSOP Packag e Minimizes Board Area and Height D PAC KAGE (TOP VIEW) ILIM FB VFF DISCH 1 2 3 4 8 VDD 7 OUT 6 GND 5 RC DESCRIPTI ON The UCC25705-Q1 and UCC25706-Q1 devi ces are 8-pin voltage mode primary side controllers with fast over-current pro tection. These devices are used as core high-speed building blocks in high per formance isolated and non-isolated powe r converters. UCC25705-Q1/UCC25706-Q1 devices feature a high speed oscillator with integ.
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