Document
ACPL-38JT
Automotive Gate Drive Optocoupler with R2Coupler™ Isolation, 2.5 Amp Output Current, Integrated Desaturation (VCE) Detection and Fault Status Feedback
Data Sheet
Lead (Pb) Free RoHS 6 fully compliant
RoHS 6 fully compliant options available; -xxxE denotes a lead-free product
Description
Avago’s automotive 2.5 Amp Gate Drive Optocoupler with Integrated Desaturation (VCE) Detection and Fault Status Feedback makes automotive IGBT VCE fault protection compact, affordable, and easy-to-implement while satisfying automotive AEC-Q100 Grade 1 semiconductor requirement. Avago isolation products provide the reinforced insulation and reliability needed for critical in automotive and high temperature industrial applications R2Coupler
Features
2.5 A maximum peak output current Drive IGBTs up to IC = 150 A, VCE = 1200 V Optically isolated, FAULT status feedback SO-16 package CMOS/TTL compatible 500 ns max. switching speeds “Soft” IGBT turn-off Integrated fail-safe IGBT protection – Desat (VCE) detection – Under Voltage Lock-Out protection (UVLO) with hysteresis User configurable: inverting, noninverting, auto-reset, auto-shutdown Wide operating VCC range: 15 to 30 Volts -40°C to +125°C operating temperature range 15 kV/s min. Common Mode Rejection (CMR) at VCM = 1500 V Qualified to AEC-Q100 Grade 1 Test Guidelines Regulatory approvals: – UL1577, CSA – IEC/EN/DIN EN 60747-5-5
Functional Diagram
VLED1+ VLED1– 7 8 D R I V E R SHIELD LED2 16 UVLO 13 11 10 DESAT 14
VCC2 VC VOUT DESAT
LED1 VIN+ VIN– 2 3
9, 12 VEE
VCC1 RESET FAULT GND1
4 5 6 FAULT 1
VE
15 SHIELD
VLED2+
Applications
Automotive Isolated IGBT/MOSFET Inverter gate drive Automotive DC-DC Converter AC and brushless dc motor drives Industrial inverters for power supplies and motor controls Un-interruptible Power Supplies
Figure 1. ACPL-38JT 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.
F r e e
D a t a s h e e t
h t t p : / / w
Ordering Information
ACPL-38JT is UL Recognized with 5000 Vrms for 1 minute per UL1577. Part Number
ACPL-38JT
RoHS Compliant
-000E -500E
Package
SO-16
Surface Mount
X X
Tape & Reel
X
Quantity
45 per tube 850 per reel
To order, choose a part number from the part number column and combine with the desired option from the option column to form an order entry. Example 1: ACPL-38JT-500E to order product of SO-16 Surface Mount RoHS compliant package in Tape and Reel packaging. Option datasheets are available. Contact your Avago sales representative or authorized distributor for information.
Typical Fault Protected IGBT Gate Drive Circuit
The ACPL-38JT is an easy-to-use, intelligent gate driver which makes IGBT VCE fault protection compact, affordable, and easy-to-implement. Features such as user configurable inputs, integrated VCE detection, under voltage lockout (UVLO), “soft” IGBT turn-off and isolated fault feedback provide maximum design flexibility and circuit protection.
Boundary Isolation Boundary Isolation Boundary Isolation
Battery Battery
DC-DC Converter
M
Boundary Isolation
Boundary Isolation
Boundary Isolation
Boundary Isolation
FAULT
Micro-Controller
Typical Application Block Diagram of a motor control system.
2
Free Datasheet http://www.datasheet4u.com/
1 2 3
GND1 VIN+ VIN VCC1 RESET FAULT VLED+ VLED
VE VLED2+ DESAT VCC2 VEE VC VOUT VEE
16
0.1μF 0.1μF
15 14
0.1μF
*
CBLANK 100 Ω DDESAT + VF
μC
4
Typical de-saturation protected gate drive circuit, non-inverting.
Description of Operation during Fault Condition
1. DESAT terminal monitors the IGBT VCE voltage through DDESAT. 2. When the voltage on the DESAT terminal exceeds 7 volts, the IGBT gate voltage (VOUT ) is slowly lowered. 3. FAULT output goes low, notifying the microcontroller of the fault condition. 4. Microcontroller takes appropriate action.
+ _ RF
13 12 11
5 6 7 8
0.1μF * RG
+ Q1
+ VCE
10 9
RPULL-DOWN
+ * Q2
Output Control
The outputs (VOUT and FAULT) of the ACPL-38JT are controlled by the combination of VIN, UVLO and a detected IGBT Desat condition. As indicated in the below table, the ACPL-38JT can be configured as inverting or non-inverting using the VIN+ or VIN- inputs respectively. When an inverting configuration is desired, VIN+ must be held high and VIN- toggled. When a non-inverting configuration is desired, VIN- must be held low and VIN+ toggled. Once UVLO is not active (VCC2 - VE > VUVLO), VOUT is allowed to go high, and the DESAT (pin 14) detection feature of the ACPL-38JT will be the primary source of IGBT protection. UVLO is needed to ensure DESAT is functional. Once VUVLO+ > 11.6 V, DESAT will remain functional until VUVLO< 12.4 V. Thus, the DESAT detection and UVLO features of the ACPL-38JT work in conjunction to ensure constant IGBT protection.
VIN+
X X Low X High
VINX X X High Low
UVLO (VCC2 - VE)
Activ.