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Numéro de référence | IR2085SPbF | ||
Description | HIGH SPEED/ 100V/ SELF OSCILLATING 50% DUTY CYCLE/ HALF-BRIDGE DRIVER | ||
Fabricant | International Rectifier | ||
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1 Page
Data Sheet No. PD60206 Rev.C
IR2085S &(PbF)
HIGH SPEED, 100V, SELF OSCILLATING 50% DUTY CYCLE,
Features
HALF-BRIDGE DRIVER
• Simple primary side control solution to enable half-bridge
Product Summary
DC-Bus Converters for 48V distributed systems with reduced
component count and board space.
• Integrated 50% duty cycle oscillator & half-bridge driver IC in a
single SO-8 package
• Programmable switching frequency with up to 500kHz max per
VCC (max)
Voffset(max)
High/low side
25V
100Vdc
channel
• +/- 1A drive current capability optimized for low charge MOSFETs
• Adjustable dead-time 50nsec – 200nsec
• Floating channel designed for bootstrap operation up to +100Vdc
• High and low side pulse width matching to +/- 25nsec
• Adjustable overcurrent protection
• Undervoltage lockout and internal soft start
• Also available LEAD-FREE
Description
output freq (fosc)
500kHz
Output Current (IO)
+/-1.0A(typ.)
High/low side pulse
width matching
+/- 25ns
Package
The IR2085S is a self oscillating half-bridge driver IC with 50% duty cycle ideally
suited for 36V-75V half-bridge DC-bus converters. This product is also suitable for
push-pull converters without restriction on input voltage.
Each channel frequency is equal to fosc, where fosc can be set by selecting RT & CT,
where fosc ≈ 1/(2*RT.CT). Dead-time can be controlled through proper selection of CT
and can range from 50 to 200nsec. Internal soft-start increases the pulse width during
S O -8
power up and maintains pulse width matching for the high and low outputs throughout the start up cycle. The
IR2085S initiates a soft start at power up and after every overcurrent condition. Undervoltage lockout prevents
operation if VCC is less than 7.5Vdc.
Simplified Circuit Diagram
Vbias (10-15V)
D BOOT
C BOOT
Vin ( 100V max)
RT
CT
C BIAS
Vb
Vcc HO
OSC
Vs
Cs LO
GND
S1
S2
C2
C1
S R1
L
C R Vo
S R2
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Pages | Pages 9 | ||
Télécharger | [ IR2085SPbF ] |
No | Description détaillée | Fabricant |
IR2085SPbF | HIGH SPEED/ 100V/ SELF OSCILLATING 50% DUTY CYCLE/ HALF-BRIDGE DRIVER | International Rectifier |
US18650VTC5A | Lithium-Ion Battery | Sony |
TSPC106 | PCI Bus Bridge Memory Controller | ATMEL |
TP9380 | NPN SILICON RF POWER TRANSISTOR | Advanced Semiconductor |
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