Features
• Supply current (I
CC
): 11 mA (max.)
• Supply voltage (V
CC
): 10‑30 V
• Output current (I
O
): ±0.4 A (min.)
• Switching time (t
PLH
/t
PHL
): 1 µs (max.)
• Isolation voltage (V
ISO
): 3750 Vrms (min.)
• UL 577 Recognized: File No. E55361
• CSA Approved
• 10 kV/µs Minimum Common Mode Rejection (CMR)
at Vcm = 600 V
• Creepage distance: 7.4 mm
Clearance: 7.1 mm
Applications
• IGBT/MOSFET gate drive
• AC/brushless DC motor drives
• Industrial inverters
• Switch mode power supplies
HCPL-T251
0.4 Amp Output Current IGBT Gate Drive Optocoupler
Data Sheet
Description
The HCPL‑T251 contains GaAsP LED. The LED is optically
coupled to an integrated circuit with a power output stage.
This optocoupler is ideally suited for driving power IGBTs
and MOSFETs used in motor control inverter applications.
The high operating voltage range of the output stage
provides the drive voltages required by gate controlled
devices. The voltage and current supplied by this opto‑
coupler makes it ideally suited for directly driving small
or medium power IGBTs.
Functional Diagram
CAUTION: It is advised that normal static precautions be taken in handling and assembly
of this component to prevent damage and/or degradation which may be induced by ESD.
Lead (Pb) Free
RoHS 6 fully
compliant
RoHS 6 fully compliant options available;
-xxxE denotes a lead-free product
A 0.1 µF bypass capacitor must be
connected between pins 5 and 8.
Truth Table
LED V
out
OFF LOW
ON HIGH
1
3
SHIELD
2
4
8
6
7
5
CATHODE
ANODE
N/C
V
CC
V
O
N/C
V
EE
