UCC2808A-2EP Datasheet PDF


Part Number

UCC2808A-2EP

Description

LOW POWER CURRENT MODE PUSH-PULL PWM

Manufacture

etcTI

Total Page 13 Pages
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Download UCC2808A-2EP Datasheet PDF


Features Datasheet pdf UCC2808A-1EP, UCC2808A-2EP LOW POWER CUR RENT MODE PUSH-PULL PWM SGLS187B− SE PTEMBER 2003 − REVISED MARCH 2013 D Controlled Baseline − One Assembly/Te st Site, One Fabrication Site D Extende d Temperature Performance of −40°C t o 125°C D Enhanced Diminishing Manufac turing Sources (DMS) Support D Enhanced Product-Change Notification D Qualific ation Pedigree† D Dual Output Drive S tages in Push-Pull Configuration D Curr ent Sense Discharge Transistor to Impro ve Dynamic Response † Component quali fication in accordance with JEDEC and i ndustry standards to ensure reliable op eration over an extended temperature ra nge. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biase.
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UCC2808A-2EP Datasheet
UCC2808A-1EP, UCC2808A-2EP
LOW POWER CURRENT MODE PUSH-PULL PWM
SGLS187BSEPTEMBER 2003 REVISED MARCH 2013
D Controlled Baseline
One Assembly/Test Site, One Fabrication
Site
D Extended Temperature Performance of
40°C to 125°C
D Enhanced Diminishing Manufacturing
Sources (DMS) Support
D Enhanced Product-Change Notification
D Qualification Pedigree
D Dual Output Drive Stages in Push-Pull
Configuration
D Current Sense Discharge Transistor to
Improve Dynamic Response
Component qualification in accordance with JEDEC and industry
standards to ensure reliable operation over an extended
temperature range. This includes, but is not limited to, Highly
Accelerated Stress Test (HAST) or biased 85/85, temperature
cycle, autoclave or unbiased HAST, electromigration, bond
intermetallic life, and mold compound life. Such qualification
testing should not be viewed as justifying use of this component
beyond specified performance and environmental limits.
D 130-μA Typical Starting Current
D 1-mA Typical Run Current
D Operation to 1 MHz
D Internal Soft Start
D On-Chip Error Amplifier With 2-MHz Gain
Bandwidth Product
D On Chip VDD Clamping
D Output Drive Stages Capable of 500-mA
Peak-Source Current, 1-A Peak-Sink
Current
D PACKAGE
(TOP VIEW)
COMP
FB
CS
RC
1
2
3
4
8 VDD
7 OUTA
6 OUTB
5 GND
description/ordering information
The UCC2808A is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The
UCC2808A contains all of the control and drive circuitry required for off-line or dc-to-dc fixed frequency
current-mode switching power supplies with minimal external parts count.
The UCC2808A dual output drive stages are arranged in a push-pull configuration. Both outputs switch at half
the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 60 ns to
200 ns depending on the values of the timing capacitor and resistors, thus limiting each output stage duty cycle
to less than 50%.
The UCC2808A family offers a variety of package options and choice of undervoltage lockout levels. The family
has UVLO thresholds and hysteresis options for off-line and battery powered systems. Thresholds are shown
in the ordering information table.
The UCC2808A is an enhanced version of the UCC2808 family. The significant difference is that the A versions
feature an internal discharge transistor from the CS pin to ground, which is activated each clock cycle during
the oscillator dead time. The feature discharges any filter capacitance on the CS pin during each cycle and helps
minimize filter capacitor values and current sense delay.
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 2003, Texas Instruments Incorporated
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