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International Rectifier Electronic Components Datasheet

IR3094PBF Datasheet

3 PHASE PWM CONTROLLER FOR POINT OF LOAD

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Data Sheet No. PD 94716
IR3094PBF
3 PHASE PWM CONTROLLER FOR POINT OF LOAD
DESCRIPTION
The IR3094 Control IC provides a full featured, cost effective, single chip solution to offers a compact,
efficient solution for high current POL converters. Control and 3 Phase Gate Drive functions are integrated
into a single space-saving IC.
FEATURES
x 0.85V Reference Voltage
x 3A GATELX Pull Down Drive Capability
x Programmable 100KHz to 540KHz oscillator
x Programmable Voltage Positioning (can be disabled)
x Programmable Softstart
x Programmable Hiccup Over-Current Protection with Delay to prevent false triggering
x Simplified Powergood provides indication of proper operation and avoids false triggering
x Operates up to 16V converter input with 7.5V Under-Voltage Lockout
x 4.36V Under-Voltage Lockout threshold for gate driver voltage
x Adjustable Voltage, 150mA Bias Regulator provides MOSFET Drive Voltage
x Enable Input
x OVP Flag Output detects high side fet short at powerup
x Separate OVP sense line to sense the output voltage and latched OVP with protection
x Inductor DCR sensing for current seDnastianSghweiellts4uUp.pcoormt up to 5.1V output applications
x Available 48L MLPQ package
ORDERING INFORMATION
Device
IR3094MTRPBF
IR3094MPBF
Order Quantity
3000 per Reel
100 piece strips
PACKAGE INFORMATION
DataShee
NC
NC
ROSC
VOSNS-
OCSET
VREF
VDRP
FB
EAOUT
SS/DEL
SCOMP2
SCOMP3
IR3094
48LD MLPQ
GATEH1
PGND1
GATEL1
VCCL1_2
5VUVL
GATEL2
PGND2
GATEH2
VCCH2
VCCH3
GATEH3
PGND3
48L MLPQ
(7 x 7 mm Body)
JA = 27oC/W
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09/26/05


International Rectifier Electronic Components Datasheet

IR3094PBF Datasheet

3 PHASE PWM CONTROLLER FOR POINT OF LOAD

No Preview Available !

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IR3094PBF
PIN DESCRIPTION
PIN#
1
2
3
4
5
PIN SYMBOL
NC
NC
ROSC
VOSNS-
OCSET
6 VREF
7 VDRP
8 FB
9 EAOUT
10 SS/DEL
11 SCOMP2
et4U.com
12 SCOMP3
13 LGND
14 SETBIAS
15 VCC
16 CSINP3
17 CSINM3
18 BIASOUT
19 PWRGD
20 CSINP2
21 CSINM2
22 NC
23 VCCL3
24 GATEL3
25 PGND3
26 GATEH3
27 VCCH3
28 VCCH2
29 GATEH2
30 PGND2
31 GATEL2
32 5VUVL
33 VCCL1_2
34 GATEL1
35 PGND1
36 GATEH1
37 VCCH1
38 NC
39 CSINM1
40 CSINP1
41 OVP
42 ENABLE
43 OVPSNS
44 5VREF
45 NC
46 NC
47 NC
48 NC
PIN DESCRIPTION
Not connected
Not connected
Connect a resistor to VOSNS- to program oscillator frequency, OCSET and STBIAS bias currents.
Remote Sense Input. Connect to ground at the load.
Programs the hiccup over-current threshold through an external resistor tied to VREF and an internal current
source. The bias current is a function of ROSC.
0.85V Reference voltage. Current Sensing and Over Current Protection are referenced to this pin. An
external RC network tied to VOSNS- is needed for the compensation.
Buffered average current information. Connect an external resistor to FB to program converter output.
.Iinmvepretdinagncineput to the Error Amplifier.
Output of the Error Amplifier.
Controls Converter Softstart, Power Good, and Over-Current Timing. Connect an external capacitor to
LGND to program the timing.
Compensation for the Current Share control loop. Connect a capacitor to ground to set the control loop’s
bandwidth. Phase 2 is forced to match phase 1’s current.
Compensation for the Current Share control loop. Connect a capacitor to ground to set the control loop’s
bandwidth. Phase 3 is forced to match phase 1’s current.
Local Ground and IC substrate connection.
External resistor to ground sets voltage at BIASOUT pin. Bias current is a function of ROSC.
Power for internal circuitry and source for BIASOUT regulator.
Non-inverting input to the Phase 3 Current Sense Amplifier.
Inverting input to the Phase 3 Current Sense Amplifier.
150mA open-looped regulated voltage set by SETBIAS for GATE drive bias.
Open Collector output that drives low during Softstart or any fault condition. Connect external pull-up.
Non-inverting input to the Phase 2 Current Sense Amplifier.
Inverting input to the PhasDe a2tCauSrrheenteSt4enUs.ecAommplifier.
Not connected
Power for Phase 3 Low-Side Gate Driver.
Phase 3 Low-Side Gate Driver Output and input to GATEH3 non-overlap comparator.
Return for Phase 3 Gate Drivers.
Phase 3 High-Side Gate Driver Output and input to GATEL3 non-overlap comparator.
Power for Phase 3 High-Side Gate Driver.
Power for Phase 2 High-Side Gate Driver.
Phase 2 High-Side Gate Driver Output and input to GATEL2 non-overlap comparator.
Return for Phase 2 Gate Drivers.
Phase 2 Low-Side Gate Driver Output and input to GATEH2 non-overlap comparator.
Can be used to monitor the driver supply voltage or 5V supply voltage when converting from 5V. An under
voltage condition initiates Soft Start.
Power for Phase 1 and 2 Low-Side Gate Drivers.
Phase 1 Low-Side Gate Driver Output and input to GATEH1 non-overlap comparator.
Return for Phase 1 Gate Drivers.
Phase 1 High-Side Gate Driver Output and input to GATEL1 non-overlap comparator.
Power for Phase 1 High-Side Gate Driver.
Not connected
Inverting input to the Phase 1 Current Sense Amplifier.
Non-inverting input to the Current Sense Amplifier.
Output that drives high during an Over-Voltage condition.
Enable Input. A logic low applied to this pin puts the IC into Fault mode.
Dedicated output voltage sense pin for Over Voltage Protection.
Decoupling for internal voltage reference rail.
Not connected
Not connected
Not connected
Not connected
DataShee
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09/26/05


Part Number IR3094PBF
Description 3 PHASE PWM CONTROLLER FOR POINT OF LOAD
Maker International Rectifier
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