HCPL-316J-500E Datasheet, PDF (2/33 Pages) AVAGO TECHNOLOGIES LIMITED – 2.5 Amp Gate Drive Optocoupler with Integrated (VCE) Desaturation Detection and Fault Status Feedback

Typical Fault Protected IGBT Gate Drive Circuit
The HCPL-316J is an easy-to-use, intelligent gate driver
which makes IGBT V_CE fault protection compact, afford-
able, and easy-to-implement. Features such as user con-
figurable inputs, integrated V_CE detection, under volt-
age lockout (UVLO), “soft” IGBT turn-off and isolated fault
feedback provide maximum design flexibility and circuit
protection.
μC
+
–
R_F
1 V_IN+
HCPL-316J
V_E 16
2 V_IN-
V_LED2+ 15
3 V_CC1
DESAT 14
4 GND1
V_CC2 13
5 RESET
V_C 12
6 FAULT
V_OUT 11
7 V_LED1+
V_EE 10
8 V_LED1-
V_EE 9
* ^CBLANK
100 Ω ^DDESAT
+–
V_F
+
*
–
R_G
+*
–
R_PULL-DOWN
* THESE COMPONENTS ARE ONLY REQUIRED WHEN NEGATIVE GATE DRIVE IS IMPLEMENTED.
+
V_CE
–
+
V_CE
–
Figure 1. Typical desaturation protected gate drive circuit, noninverting.
Description of Operation during Fault Condition
1. DESAT terminal monitors the IGBT V_CE voltage through
D_DESAT.
2. When the voltage on the DESAT terminal exceeds
7 volts, the IGBT gate voltage (V_OUT) is slowly
lowered.
3. FAULT output goes low, notifying the microcontroller
of the fault condition.
4. Microcontroller takes appropriate action.
Output Control
The outputs (V_OUT and FAULT) of the HCPL-316J are con-
trolled by the combination of V_IN, UVLO and a detected
IGBT Desat condition. As indicated in the below table, the
HCPL-316J can be configured as inverting or non-invert-
ing using the V_IN+ or V_IN- inputs respectively. When an in-
verting configuration is desired, V_IN+ must be held high
and V_IN- toggled. When a non-inverting configuration is
desired, V_IN- must be held low and V_IN+ toggled. Once
UVLO is not active (V_CC2 - V_E > V_UVLO), V_OUT is allowed to
go high, and the DESAT (pin 14) detection feature of the
HCPL-316J will be the primary source of IGBT protection.
UVLO is needed to ensure DESAT is functional. Once V_U-
VLO+ ^{> 11.6 V, DESAT will remain functional until V}UVLO- ^<
12.4 V. Thus, the DESAT detection and UVLO features of
the HCPL-316J work in conjunction to ensure constant
IGBT protection.
Desat Condition
Pin 6
UVLO
Detected on
(FAULT)
V_IN+
V_IN-
(V_CC2 - V_E)
X
X
Active
Pin 14
X
Output
V_OUT
X
Low
X
X
X
Yes
Low
Low
Low
X
X
X
X
Low
X
High
X
X
X
Low
High
Low
Not Active
No
High
High
2