MIC4607 Datasheet, PDF (13/42 Pages) Microchip Technology – 85V, Three-Phase MOSFET Driver with Adaptive Dead-Time, Anti-Shoot-Through and Overcurrent Protection

MIC4607
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
Pin Number
QFN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
QFN PIN FUNCTION TABLE
Pin Name
MIC4607-1 MIC4607-2
Description
BHI
ALI
AHI
EN
FLT/
BHB
BHO
BHS
BLO
NC
ILIM-
VSS
ILIM+
ALO
AHS
AHO
AHB
VDD
DLY
VSS
CLO
CHS
BPWM
NC
APWM
EN
FLT/
BHB
BHO
BHS
BLO
NC
ILIM-
VSS
ILIM+
ALO
AHS
AHO
AHB
VDD
DLY
VSS
CLO
CHS
High-side input (-1) or PWM input (-2) for Phase B.
Low-side input (-1) or no connect (-2) for Phase A.
High-side input (-1) or PWM input (-2) for Phase A.
Active high enable input. High input enables all outputs and initiates
normal operation. Low input shuts down device into a low LQ mode.
Open Drain. FLT/ pin goes low when outputs are latched off due to an
overcurrent event. Must be pulled-up to an external voltage with a
resistor.
Phase B High-Side Bootstrap Supply. An external bootstrap capacitor
is required. Connect the bootstrap capacitor across this pin and B_HS.
An on-board bootstrap diode is connected from V_DD to B_HB.
Phase B High-Side Drive Output. Connect to the gate of the external
high-side power MOSFET.
Phase B High-Side Driver Return. Connect to the bootstrap capacitor
and to a resistor that connect to the source of the external MOSFET.
See the Applications section for additional information on the resistor.
Phase B Low-Side Drive Output. Connect to the gate of the low-side
power MOSFET gate.
No Connect.
Differential Current-Limit Input. Connect to most negative end of the
external current-sense resistor.
Power Ground for Phase A and Phase B.
Differential Current-Limit Input. Connect to most positive end of the
external current-sense resistor.
Phase A Low-Side Drive Output. Connect to the gate of the low-side
power MOSFET gate.
Phase A High-Side Driver Return. Connect to the bootstrap capacitor
and to a resistor that connect to the source of the external MOSFET.
See the Applications section for additional information on the resistor.
Phase A High Side Drive Output. Connect to the gate of the external
high-side power MOSFET.
Phase A High-Side Bootstrap Supply. An external bootstrap capacitor
is required. Connect the bootstrap capacitor across this pin and A_HS.
An on-board bootstrap diode is connected from V_DD to A_HB.
Input Supply for Gate Drivers and Internal Logic/Control Circuitry.
Decouple this pin to V_SS with a minimum 2.2 μF ceramic capacitor.
Fault Delay. Connect an external capacitor from this pin to ground to
increase the current-limit reset delay. Leave open for minimum delay.
Do not externally drive this pin.
Phase C Power and Control Circuitry Ground.
Phase C Low-Side Drive Output. Connect to the gate of the low-side
power MOSFET gate.
Phase C High-Side Driver Return. Connect to the bootstrap capacitor
and to a resistor that connect to the source of the external MOSFET.
See the Applications section for additional information on the resistor.
 2016 Microchip Technology Inc.
DS20005610A-page 13