ACPL-K34T
Automotive 2.5 A Peak High Output Current MOSFET Gate Drive Optocoupler
with Rail-to-Rail Output Voltage in Stretched SO8
Data Sheet
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
Description
Avago's 2.5 Amp Automotive R
2
Coupler Gate Drive Op-
tocoupler contains an AlGaAs LED, which is optically cou-
pled to an integrated circuit with a power output stage.
The ACPL-K34T features fast propagation delay and tight
timing skew, is ideally designed for driving power MOS-
FETs used in AC-DC and DC-DC converters. The high oper-
ating voltage range of the output stage provides the drive
voltages required by gate controlled devices. The voltage
and high peak output current supplied by this optocou-
pler make it ideally suited for direct driving power MOS-
FETs at high frequency for high eciency conversion.
Avago R
2
Coupler isolation products provide reinforced
insulation and reliability that delivers safe signal isolation
critical in automotive and high temperature industrial ap-
plications.
Functional Diagram
Truth Table
LED V
CC
– V
EE
V
OUT
OFF 0 – 20V LOW
ON <V
UVLO-
LOW
ON >V
UVLO+
HIGH
Features
• Qualied to AEC-Q100 Grade 1 Test Guidelines
• Automotive temperature range: -40 °C to 125 °C
• Peak output current: 2.0 A min.
• Rail-to-rail output voltage
• Propagation delay: 110 ns max.
• Dead time distortion: +50 ns/-40 ns
• LED current input drive with hysteresis
• Common Mode Rejection (CMR): 50 kV/µs min. at V
CM
= 1500 V
• Low supply current allow bootstrap half-bridge
topology: I
CC
= 3.9 mA max.
• Under Voltage Lock-Out (UVLO) protection with
hysteresis for power MOSFET
• Wide operating V
CC
range: 10 V to 20 V
• Safety Approvals:
- UL Recognized 5000 V
RMS
for 1 min
- CSA
- IEC/EN/DIN EN 60747-5-5 V
IORM
= 1140 V
peak
Applications
• Hybrid Power Train DC/DC Converter
• EV/PHEV Charger
• Automotive Isolated MOSFET Gate Drive
• AC and Brushless DC motor drives
Figure 1. ACPL-K34T Functional Diagram
Note: Minimum 1 µF bypass capacitor must be connected between pins
V
CC
and V
EE
.
8
7
6
5
1
2
3
4
ANODE
NC
CATHODE
NC
VCC
V
OUT
V
EE
NC
SHIELD
