MC33883HEG FREESCALE [Freescale Semiconductor, Inc], MC33883HEG Datasheet - Page 12

• Manufacturer Part Number: MC33883HEG
• Description: H-Bridge Gate Driver IC
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

DRIVER CHARACTERISTICS
gate driver. In the schematic, HSS represents the switch that
is used to charge the external high-side MOSFET through the
GATE_HS pin. LSS represents the switch that is used to
discharge the external high-side MOSFET through the
GATE_HS pin. A 180K internal typical passive discharge
resistance and a 18 V typical protection zener are in parallel
with LSS. The same schematic can be applied to the external
low-side MOSFET driver simply by replacing pin CP_OUT
with pin LR_OUT, pin GATE_HS with pin GATE_LS, and pin
SRC_HS with GND.
IN_HS1
12
33883
FUNCTIONAL DEVICE OPERATION
Figure 5. High-Side Gate Driver Functional Schematic
Figure 5
represents the external circuit of the high-side
HSSDC_IN
HSSpulse_IN
LSS_IN
HSS
LSS
FUNCTIONAL DEVICE OPERATION
I
I
discharge LSS
charge HSS
18V
180
k
CP_OUT
GATE_HS1
SRC_HS1
I
GATE_HS
driver are illustrated in
peak current of up to 1.0 A for 200 ns to turn on the gate. After
200 ns, 100 mA is continuously provided to maintain the gate
charged. The output driver sinks a high current to turn off the
gate. This current can be up to 1.0 A peak for a 100 nF load.
chronograms. A smaller load will give lower peak and DC charge or
discharge currents.
HSSpulse_IN
I
HSS DC_IN
discharge LSS
The different voltages and current of the high-side gate
Note GATE_HS is loaded with a 100 nF capacitor in the
I
charge HSS
I
GATE_HS
IN_HS1
LSS_IN
Figure 6. High-Side Gate Driver Chronograms
0
0
0
0
0
0
Analog Integrated Circuit Device Data
Figure
1.0 A Peak
1.0 A Peak
6. The output driver sources a
100 mA Typical
100 mA Typical
Freescale Semiconductor
1.0 A Peak
-1.0 A Peak