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UCC2808AQDR-2EP Datasheet

  • UCC2808AQDR-2EP

  • LOW POWER CURRENT MODE PUSH-PULL PWM

  • 10頁(yè)

  • TI

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UCC2808A 1EP, UCC2808A 2EP
LOW POWER CURRENT MODE PUSH PULL PWM
SGLS187A 鈭?SEPTEMBER 2003 鈭?REVISED SEPTEMBER 2003
D
Controlled Baseline
D
D
D
D
D
D
鈭?One Assembly/Test Site, One Fabrication
Site
Extended Temperature Performance of
鈭?0擄C to 125擄C
Enhanced Diminishing Manufacturing
Sources (DMS) Support
Enhanced Product-Change Notification
Qualification Pedigree
鈥?/div>
Dual Output Drive Stages in Push-Pull
Configuration
Current Sense Discharge Transistor to
Improve Dynamic Response
D
D
D
D
D
D
D
130-碌A(chǔ) Typical Starting Current
1-mA Typical Run Current
Operation to 1 MHz
Internal Soft Start
On-Chip Error Amplifier With 2-MHz Gain
Bandwidth Product
On Chip VDD Clamping
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
7
6
5
VDD
OUTA
OUTB
GND
鈥?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.
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.
Copyright
錚?/div>
2003, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

UCC2808AQDR-2EP 產(chǎn)品屬性

  • 1

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 切換控制器

  • -

  • 電流模式

  • 2

  • 1MHz

  • 50%

  • 4.1 V ~ 15 V

  • 無(wú)

  • 無(wú)

  • 無(wú)

  • 無(wú)

  • 無(wú)

  • 無(wú)

  • 無(wú)

  • 是

  • -40°C ~ 125°C

  • 8-SOIC（0.154"，3.90mm 寬）

  • Digi-Reel®

  • 296-21293-6

UCC2808AQDR-2EP相關(guān)型號(hào)PDF文件下載

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