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PDF ACPL-344JT Data sheet ( Hoja de datos )
| Número de pieza | ACPL-344JT | |
| Descripción | Automotive 2.5A Gate-Drive Optocoupler | |
| Fabricantes | AVAGO | |
| Logotipo |  |
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ACPL-344JT
Automotive 2.5A Gate-Drive Optocoupler
with Integrated IGBT Desat Overcurrent Sensing,
Miller-Current Clamping, and Under-Voltage Lockout Feedback
Data Sheet
Description
The Avago Technologies Automotive 2.5A Gate-Drive
Optocoupler features fast propagation delay with
excellent timing-skew performance. Smart features that
are integrated to protect the IGBT include IGBT
desaturation sensing with soft-shutdown protection
and fault feedback, under-voltage lockout and feedback,
and active Miller-current clamping. This full-featured
and easy-to-implement IGBT gate-drive optocoupler
comes in a compact, surface-mountable SO-16 package
for space savings. It is suitable for traction power-train
inverter, power converter, battery charger, air-con, and
oil-pump motor drives in HEV and EV applications and
satisfies automotive AEC-Q100 semiconductor
requirements.
Avago's R2Coupler isolation products provide reinforced
insulation and reliability that deliver safe-signal isolation
critical in automotive and high-temperature industrial
applications.
Functional Diagram
VE VCC2
13 12
VCC1 3
UVLO
/UVLO 5
/FAULT 6
VEE1 1
NC 2
NC 4
AN 7
CA 8
Input
Driver
Output
Driver
CuOrvreernt
SS Control
Miller Control
Figure 1. ACPL-344JT Functional Diagram.
9 16
VEE2 VEE2
15 LED2+
14 DESAT
11 VO
10 SSD/
CLAMP
Features
• Qualified to AEC-Q100 Grade 1 Test Guidelines
• Automotive temperature range: –40°C to +125°C
• Common Mode Rejection (CMR): >50 kV/μs at
VCM = 1500V
• High Noise Immunity:
– Miller-Current Clamping
– Direct LED input with low-input impedance and
low-noise sensitivity
– Negative Gate Bias
• Peak output current: 2.5A max.
• Miller Clamp-Sinking Current: 1.9A max.
• Wide Operating Voltage: 15V to 25V
• Propagation delay: 250 ns max.
• Integrated fail-safe IGBT protection
– Desat sensing, 'Soft' IGBT turn-off, and Fault
Feedback
– Under-Voltage Lock-Out protection (UVLO) with
Feedback
• SO-16 package with 8 mm clearance and creepage
• Regulatory approvals:
– UL1577, CSA
– IEC/EN/DIN EN 60747-5-5
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
• Uninterruptible power supplies (UPS)
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.
1 page  
DESAT Fault Detection Blanking Time
The DESAT fault detection circuitry must remain disabled for a short time period following the turn-on of the IGBT to
allow the collector voltage to fall below the DESAT threshold. This time period, called the total DESAT blanking time, is
controlled by the both internal DESAT blanking time tDESAT(BLANKING) (Figure 6) and external blanking time, determined
by internal charge current, the DESAT voltage threshold, and the external DESAT capacitor.
The total blanking time is calculated in terms of internal blanking time (tDESAT(BLANKING)), external capacitance (CBLANK),
FAULT threshold voltage (VDESAT), and DESAT charge current (ICHG):
tBLANK = tDESAT(BLANKING) + CBLANK × VDESAT/ICHG
VCC1
+ 5V
10 kΩ
10 kΩ
µC 330 pF
330 pF
1 VEE1
1 µF 2 NC
3 VCC1
4 NC
5 /UVLO
6 /FAULT
130Ω
130Ω 7 AN
8 CA
VEE2 16
LED2+ 15
DESAT 14
VE 13
VCC2 12
VO 11
SSD/CLAMP 10
VEE2 9
VCC2
1 kΩ
220 pF
1 µF
10Ω
10 µF
10 µF
ACPL-344JT
Figure 3. Typical gate-drive circuit with Desat current sensing using ACPL-344JT.
VEE2
Description of Gate Driver and Miller Clamping
The gate driver is directly controlled by the LED current. When LED current is driven HIGH, the output of ACPL-344JT
is capable of delivering 2.5A sourcing current to drive the IGBT’s gate. While LED is switched off, the gate driver can
provide 2.5A sinking current to switch the gate off fast. An additional Miller clamping pull-down transistor is activated
when output voltage reaches about 2V with respect to VEE2 to provide a low impedance path to Miller Current, as
shown in Figure 4.
IF
VO
VGATE
Figure 4. Gate-Drive Signal Behavior.
5
5 Page 
Electrical Specifications (continued)
Unless otherwise specified, all minimum/maximum specifications are at recommended operating conditions, all
voltages at input IC are referenced to VEE1, all voltages at output IC referenced to VEE2. All typical values at TA = 25°C,
VCC1 = 12V, VCC2 – VEE2 = 20V, VE – VEE2 = 0V.
Parameter
Symbol
Min. Typ. Max. Units Test Conditions Fig. Note
Desaturation Protection (Desat voltage VDESAT reference to VE)
Desat Sensing Threshold
VDESAT
6.2 7.0 7.8 V
16 8
Desat Charging Current
ICHG
–1.2 –0.9 –0.6 mA VDESAT = 2 V
17
Desat Discharging Current
IDSCHG
20 53
mA VDESAT = 8 V
18
Internal Desat Blanking Time
tDESAT(BLANKING) 0.3 0.6 1.0 μs CSSD = 1 nF
22
Desat Sense to 90% SSD Delay
tDESAT(90%)
0.3 μs
23
Desat Sense to 10% SSD Delay
tDESAT(10%)
0.8 μs
24
Desat to Low Level /FAULT Signal Delay
tDESAT(/FAULT)
7.0 μs
25
Output Mute Time due to Desat
tDESAT(MUTE)
2.3 3.2
4.1 ms
26
Time for Input Kept Low Before Fault Reset to tDESAT(RESET) 2.3 3.2 4.1 ms
High
27
Package Characteristics
Parameter
Input-Output Momentary Withstand Voltage
Symbol Min.
VISO 5000
Resistance (Input-Output)
Capacitance (Input-Output)
Thermal coefficient between LED and input IC
Thermal coefficient between LED and output IC
Thermal coefficient between input IC and output IC
Thermal coefficient between LED and Ambient
Thermal coefficient between input IC and Ambient
Thermal coefficient between output IC and Ambient
RI-O
CI-O
AEI
AEO
AIO
AEA
AIA
AOA
Typ. Max.
1014
1.3
35.4
33.1
25.6
176.1
92
76.7
Units
VRMS
Ω
pF
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Test Conditions
Notes
RH < 50%, t = 1 min. 28, 29, 30
TA = 25°C
VI-O = 500 VDC
30
f = 1 MHz
11
11 Page | ||
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| PDF Descargar | [ Datasheet ACPL-344JT.PDF ] | |
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