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Part: ISL6700IR-T
Category:
Power Management
-> broadband power
Description: 80V/1.25A Peak, Medium Frequency, Low Cost, Half-bridge Driver
Company: Intersil Corporation
Datasheet: Download ISL6700IR-T datasheet File size : 330 kB
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Datasheet text preview:
®
ISL6700
D a ta Sheet J u l y 2003 FN9077.1
80V/1.25A Peak, Medium Frequency, Low Cost, Half-Bridge Driver
The ISL6700 is an 80V/1.25A peak, medium frequency, low cost, half-bridge driver IC available in 8-lead SOIC and 12-lead QFN plastic packages. The low-side and high-side gate drivers are independently controlled and matched to 25ns. This gives the user maximum flexibility in dead-time selection and driver protocol. Undervoltage protection on both the low-side and high-side supplies force the outputs low. Non-latching, level-shift translation is used to control the upper drive circuit. Unlike some competitors, the high-side output returns to its correct state after a momentary undervoltage of the high-side supply.
Features
· Drives 2 N-Channel MOSFETs in Half-Bridge Configuration · Space Saving SO8 and Low RC-S QFN Packages · Phase Supply Max Voltage to 80VDC · Bootstrap Supply Max Voltage to 96VDC · Drives 1000pF Load with Rise and Fall Times Typ. 15ns · TTL/CMOS Compatible Input Thresholds · Independent Inputs for Non-Half-Bridge Topologies · No Start-Up Problems · Low Power Consumption
Ordering Information
PART NUMBER ISL6700 IB ISL6700 IR TEMP. RANGE (oC) -40oC to 125oC -40oC to 125oC PACK AGE 8 Ld SOIC 12 Ld QFN PKG. DWG. # M 8. 15 L12.4x4
· Wide Supply Range · Supply Undervoltage Protection · QFN Package - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline
Applications
· Telecom/Datacom Power Supplies · Half-Bridge Converters · Two-Switch Forward Converters · Active Clamp Forward Converters
Pinouts
ISL6700IB (SOIC) TOP VIEW
VDD HI LI VSS 1 2 3 4 8 7 6 5 HB
HO
ISL6700IR (QFN) TOP VIEW
VDD NC 11 HB 10 9 8 7 4 VSS 5 NC 6 LO HO NC HS
12 HI NC LI 1 2 3
HS LO
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2003. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.
ISL6700 Application Block Diagram
+12V +48V
V DD
HB
SECONDARY CIRCUIT
HI CONTROL PWM CONTROLLER LI
DRIVE HI
HO HS
DRIVE LO
LO
ISL6700 VSS
REFERENCE AND ISOLATION
Functional Block Diagram
8 U/V LEVEL SHIFT DRIVER 7 6 HO HS HB
HI 2
LI
3
TURN-ON DELAY DETECTOR UNDERVOL TAGE
DRIVER 5 LO
V DD 1
VSS 4
2
ISL6700
+48V +12V
PWM
ISL6700
SECONDARY CIRCUIT
ISOLATION
FIGURE 1. TWO-SWITCH FORWARD CONVERTER
+48V +12V SECONDARY CIRCUIT
PWM
ISL6700
ISOLATION
FIGURE 2. FORWARD CONVERTER WITH AN ACTIVE CLAMP
3
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