IRS27952STRPBF International Rectifier, IRS27952STRPBF Datasheet - Page 17

• Manufacturer Part Number: IRS27952STRPBF
• Description: IC DRIVER HALF-BRIDGE 8SOIC
• Manufacturer: International Rectifier

Specifications of IRS27952STRPBF

• Output Isolation: Isolated
• Frequency Range: 46.6kHz ~ 285kHz
• Voltage - Input: 12 V ~ 18 V
• Voltage - Output: 12 V ~ 18 V
• Power (watts): 833mW
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Package: 8-lead SOIC
• Circuit: Resonant Half-Bridge
• Offset Voltage (v): 600
• Output Source Current Min (ma): 300
• Output Sink Current Min (ma): 900
• Vcc Range (v): 10-20V with UVLO
• Programmable Frequency (khz): 25-500
• Programmable Deadtime (ns): 200-2000
• Ocp Threshold (v): 3
• Pbf: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

User initiated Micro Power Sleep mode
The IC can be actively pushed into a micropower sleep mode where current consumption is less than 200uA by
pulling the CT pin below the sleep threshold V
user to disable the resonant power converter during application standby modes in order to meet regulation
standards (Blue Angel, Energy Start, Green Power etc). This IC disabling feature can also be use to implement
other system protection features.
Gate Drive Capability
The gate drive output stage of the IC is capable of 0.3A peak source current and 0.9A peak sink current drive
capability. Gate drive buffer circuits can be easily driven with the GATE pin of the IC to adapt to any system power
level.
System Protection Features
IRS2795 uses IR’s high-voltage technology to implement a VS sensing circuitry that monitors the current through
the low-side half bridge MOSFET for short circuit faults. By using the R
an additional current sensing resistor is eliminated. The voltage at the VS node is sensed after a leading edge
blanking time on LO. When the sensed voltage exceeds the protection thresholds, the IC enters Current Fault
Mode (gate drive outputs are disabled and the oscillator pins are internally discharged to COM).
This protection feature is latched and the IC supply voltage must be pulled below the UVLO threshold and then
again above VCCON in order to reset the latch and restart the IC.
www.irf.com
Figure 5: IC transition from normal to sleep mode by pulling down CT/SD pin
EN2
, even while the IC VCC is above VCCON. This mode allows the
17
DSON
of the low-side MOSFET, the need for
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IRS27951S
IRS27952S