HIP9021IB INTERSIL [Intersil Corporation], HIP9021IB Datasheet - Page 5

• Manufacturer Part Number: HIP9021IB
• Description: Portable Battery Drive/Torque Controller for N-Channel MOSFETs in Motor Control Systems
• Manufacturer: INTERSIL [Intersil Corporation]

Pin Descriptions
NOTE: The value chosen for the torque level set pot is dependent on the type of power MOSFET and motor characteristics.
FIGURE 2. TYPICAL OPERATING CIRCUIT SHOWING THE HIP9021IB AS AN N-CHANNEL MOSFET DRIVER IN A PORTABLE
TRIGGER
TORQUE
DELAY
DRAIN
NAME
GATE
GND
OSC
V
DD
The TRIGGER is a combined SW/Speed Control function. Motor speed increases as the TRIGGER voltage decreases.
Speed control range: 2.35V (Min) < V
LEVEL SET
7.5V
TORQUE
BATTERY ELECTRIC DRILL APPLICATION
100K
180K
5.6K
NUMBER
1
2
3
4
5
6
7
8
200K
270K
1 F
CONTROL
SPEED
TORQUE
TRIGGER
The input to the DRAIN pin senses the drain of a power MOSFET Output Motor Driver. The DRAIN volt-
age is an image of the current flowing through the power MOSFET. By limiting this voltage, the torque of
the motor can be controlled.
The TRIGGER input is an analog voltage control level used to fix the duty-cycle at the DRAIN Output. A
voltage level here is determined by a potentiometer adjustment. The TRIGGER voltage level is com-
pared with the triangle signal from the internal oscillator to produce a pulse-width modulated signal.
Negative pole of the battery or system ground reference.
Oscillator output normally terminated in a charge/discharge capacitor. A constant current is flowing in
and out to charge and discharge the external capacitor.
The TORQUE input is a reference level adjustment for torque control. The voltage reference is compared
with DRAIN input. If V
An external capacitor at the DELAY output is used to delay the torque control action. The external ca-
pacitor at the DELAY pin will start to be charged if a MOSFET output over-current condition is detected.
The purpose of the capacitor is to delay the disabling action of the signal GATE drive.
The GATE output drives the Gate of the Power MOSFET.
Positive pole of the battery or Power Supply Voltage, nominally 7.5V.
470K
1nF
TRIGGER
HIP9021
+
V
DD
OSCILLATOR
< 5.25V (Max)
DRAIN
+
-
HIP9021
> V
330
GC
-
+
CONTROL
&
TORQUE
5
LOGIC
, the GATE output pulse drive must be disabled.
GND
SW
DESCRIPTION
OSC
DRAIN
DELAY
GATE
3.3 F
15K
1nF
V
BATT
PORTABLE
ELECTRIC
DRILL MOTOR
RFP45N03L
N-CHANNEL
POWER
MOSFET