IC PWM BUCK ISOLATED CTRLR 8SOIC

UCC28089DRG4

Manufacturer Part NumberUCC28089DRG4
DescriptionIC PWM BUCK ISOLATED CTRLR 8SOIC
ManufacturerTexas Instruments
UCC28089DRG4 datasheet
 


Specifications of UCC28089DRG4

Pwm TypeControllerNumber Of Outputs2
Frequency - Max1MHzDuty Cycle50%
Voltage - Supply8.5 V ~ 14 VBuckYes
BoostNoFlybackNo
InvertingNoDoublerNo
DividerNoCukNo
IsolatedYesOperating Temperature-40°C ~ 105°C
Package / Case8-SOIC (3.9mm Width)Frequency-max1MHz
Maximum Operating Temperature+ 105 CMounting StyleSMD/SMT
Minimum Operating Temperature- 40 CLead Free Status / RoHS StatusLead free / RoHS Compliant
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
Page 1/23

Download datasheet (564Kb)Embed
Next
PRIMARY-SIDE PUSH-PULL OSCILLATOR
FEATURES
Push-Pull Oscillator With Programmable
D
Deadtime
High-Current Totem-Pole Dual Output Stage
D
Drives Push-Pull Configuration with 1-A Sink
and 0.5-A Source Capability
Can be Used in Push-Pull, Half-Bridge, or
D
Full-Bridge Topologies
Oscillator Synchronization Output
D
Low Start-Up Current of 130 μA and 1.4-mA
D
Typical Run Current
Over-Current Shutdown
D
Digitally Controlled Over-Current/Retry
D
Feature
Undervoltage Lockout With Hysteresis
D
TYPICAL APPLICATION
+
V
= 48 V
IN
- -
RA
UCC28089
1
SYNC
VDD
8
2
DIS
OUTA
7
RB
3
CT
OUTB
6
CT
4
CS
GND
5
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.
WITH DEAD-TIME CONTROL
APPLICATIONS
High Efficiency Cascaded Converters
D
Inverters
D
Electronic Ballasts
D
Uninterruptable Power Supplies (UPS)
D
AC or DC Links
D
DESCRIPTION
The UCC28089 is a versatile BiCMOS controller for
dc-to-dc or off-line fixed-frequency switching power
supplies. The UCC28089 has dual alternating output
stages in dual-alternating push-pull configuration. Both
outputs switch at half the oscillator frequency using a
toggle flip-flop and duty cycle is limited to less than 50%.
www.ti.com
UCC28089
SLUS623A -- SEPTEMBER 2004 -- REVISED AUGUST 2006
BIAS
UCC2540
G1
18
2
REF
VDD
16
PGND
15
4
SYNCIN
G2
14
V
= 1.2 V
O
+
- -
UDG-04112
1

UCC28089DRG4 Summary of contents

  • Page 1

    ... CS GND 5 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 ...

  • Page 2

    UCC28089 SLUS623A -- SEPTEMBER 2004 -- REVISED AUGUST 2006 DESCRIPTION (CONTINUED) The UCC28089 is optimized for use as the primary-side companion controller for a cascaded converter that has secondary-side control. The device incorporates dead-time programming. The synchronization output also provides ...

  • Page 3

    ABSOLUTE MAXIMUM RATINGS over operating free-air temperature (unless otherwise noted) PARAMETER Supply voltage (I < 10 mA) DD Supply current OUTA/OUTB sink current (peak) OUTA/OUTB source current (peak) SYNC sink current (peak) SYNC source current (peak) Analog inputs (DIS, CT, ...

  • Page 4

    UCC28089 SLUS623A -- SEPTEMBER 2004 -- REVISED AUGUST 2006 ELECTRICAL CHARACTERISTICS --40°C to 105°C for UCC28089 (see Note 1), 1 μF capacitor from VDD to GND 110 kΩ 182 Ω, ...

  • Page 5

    FUNCTIONAL BLOCK DIAGRAM VDD 1 SYNC OSCILLATOR 2 DIS VDD/5 S VDD/19 SOFT- -START & FAULT 56 STEP START DELAY GO OVER CURRENT R COMP 4 CS 0.725 V PIN # NAME I/O Active when OUTA and ...

  • Page 6

    UCC28089 SLUS623A -- SEPTEMBER 2004 -- REVISED AUGUST 2006 UCC28089 is an alternating dual-driver output oscillator with over-current and under-voltage fault protection. This feature set is ideal as a start-up controller for isolated power systems where the majority of control ...

  • Page 7

    The recommended oscillator frequency range MHz. In order to avoid noise issues small enough for the oscillator to have at least 10 μA of current. There are two sets of oscillator programming equations that ...

  • Page 8

    UCC28089 SLUS623A -- SEPTEMBER 2004 -- REVISED AUGUST 2006 Using the UCC28089 as the Primary-Side start-up Controller in a Cascaded Push-Pull Buck Two-Stage Converter The cascaded push-pull topology is ideal for converting from moderate bus voltages, such as 48-V telecom ...

  • Page 9

    APPLICATION INFORMATION Program the oscillator frequency of the UCC28089 to equal the desired switching frequency of the output post regulator. The secondary-side controller may also need corresponding switching frequency programming, such as RAMP and G2C capacitor values for the UCC2540. ...

  • Page 10

    UCC28089 SLUS623A -- SEPTEMBER 2004 -- REVISED AUGUST 2006 Synchronization of Multiple UCC28089 Controllers to an External Signal In systems where multiple UCC28089 parts need to be synchronized to a common clock, a 3.3-V logic-level signal can be directly applied ...

  • Page 11

    Using the UCC28089 as a Modified Square Wave Inverter Remote or dc-only power systems often require a limited amount of 60-Hz ac line power to supply small appliances. Compatible loads include universal motors, incandescent lamps, and other electronic devices with ...

  • Page 12

    UCC28089 SLUS623A -- SEPTEMBER 2004 -- REVISED AUGUST 2006 If desired, the 60-Hz modified square wave inverter frequency could be programmed using an external sync signal that might originate from a separate oscillator or digital controller. The following diagram in ...

  • Page 13

    OSCILLATOR FREQUENCY vs TEMPERATURE 220 R = 110 kΩ A 215 R = 182 Ω 220 pF T 210 205 200 195 190 185 180 - - Temperature - ...

  • Page 14

    UCC28089 SLUS623A -- SEPTEMBER 2004 -- REVISED AUGUST 2006 OSCILATOR FREQUENCY 100 100 1 μ 10 μ 100 μ Figure 11 SYNC PULSE ...

  • Page 15

    PROPAGATION DELAY (SYNC RISE TO OUTPUT FALL) vs TEMPERATURE - Temperature - - °C Figure 15 OSCILLATOR DISCHARGE ON-RESISTANCE vs TEMPERATURE 50 v ...

  • Page 16

    UCC28089 SLUS623A -- SEPTEMBER 2004 -- REVISED AUGUST 2006 SUPPLY CURRENT vs OSCILLATOR FREQUENCY (NO LOAD) 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 200 K 400 Oscillator Frequency - - kHz OSC Figure 19 TYPICAL ...

  • Page 17

    ... REFERENCES 1. Power Supply Seminar SEM--1300 Topic 1: Unique Cascaded Power Converter Topology for High Current Low Output Voltage Applications Balogh, C. Bridge and B. Andreycak, Texas Instruments Literature No. SLUP133 2. Low Cost Inverter Suitable for Medium-Power Fuel Cell Sources, by P.T. Krein and R Balog, IEEE Power Electronics Specialists Conference Proceedings, 2002, vol ...

  • Page 18

    ... UCC28089D ACTIVE UCC28089DG4 ACTIVE UCC28089DR ACTIVE UCC28089DRG4 ACTIVE (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design ...

  • Page 19

    TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing UCC28089DR SOIC D PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 8 2500 330.0 12.4 6.4 Pack Materials-Page 1 29-Jul-2008 ...

  • Page 20

    Device Package Type UCC28089DR SOIC PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm 2500 Pack Materials-Page 2 29-Jul-2008 Width (mm) Height (mm) 346.0 346.0 29.0 ...

  • Page 21

    ...

  • Page 22

    ...

  • Page 23

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...