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PDF HIP9021 Data sheet ( Hoja de datos )
| Número de pieza | HIP9021 | |
| Descripción | Portable Battery Drive/Torque Controller for N-Channel MOSFETs in Motor Control Systems | |
| Fabricantes | Intersil Corporation | |
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HIP9021
PRELIMINARY
August 1996
Portable Battery Drive/Torque Controller for
N-Channel MOSFETs in Motor Control Systems
Features
Description
• MOSFET Driver and DC Motor Controller
• Torque Control and Overload Protection
• Battery Power Supply . . . . . . . . . . . . . . . . +5V to +15V
• BiMOS IC with Low Operating Current
- Maximum Supply Current . . . . . . . . . . . . . . . . .1.5mA
- Maximum Input Leakage Currents . . . . . . . . . . 1.5µA
• 500µA Maximum Supply Current
• 1µA Maximum Input Leakage Currents
• Typical Oscillator Frequency . . . . . . . . . . . . . . . . . 5kHz
• Power-On-Reset Control
• 10mA Drive Capability for Gate Output
• Operating Temperature . . . . . . . -40oC to +85oC Range
Applications
• Portable Battery Operated Electric Drills
• Controller for Small DC Electric Motors
• Torque/Drive Controller for Inductive Loads
• Intelligent MOSFET Drive
Ordering Information
PART NUMBER
HIP9021IB
TEMP.
RANGE (oC)
PACKAGE
-40 to +85 8 Ld SOIC
PKG.
NO.
M8.15
The HIP9021IB is a dedicated Power MOSFET driver which
drives a DC motor. As a system, motor speed is controlled
while controlling torque. The primary application is drive con-
trol for portable drills while providing overload protection.
The main function of the HIP9021IB is to produce a pulse
width modulated square wave signal which drives the gate of
an N-Channel Power MOSFET. The duty-cycle is deter-
mined by the setting of an external potentiometer at the
TRIGGER (speed control) input. As the TRIGGER voltage
level is decreased the duty-cycle of the square wave and the
speed of the motor is increased.
The torque of the motor is limited by the voltage level sensed
at the drain of the external Power MOSFET. When the cur-
rent reaches an adjustable limit set at the TORQUE input,
the drive of the Power MOSFET is disabled.
The system control components include 2 adjustable poten-
tiometer controls and 2 capacitors for the operating fre-
quency and torque delay control. A fixed or battery supply
voltage in the range of 5V to 15V may be used.
The HIP9021IB is provided in a small outline plastic package
for a compact surface mount to a ceramic substrate. The
surface mount assembly can be fit directly into the trigger of
a portable electric drill.
Pinout
HIP9021IB
(SOIC)
TOP VIEW
DRAIN 1
TRIGGER 2
GND 3
OSC 4
8 VDD
7 GATE
6 DELAY
5 TORQUE
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
1
File Number 4055
1 page  
HIP9021
Pin Descriptions
NAME
NUMBER
DRAIN
1
TRIGGER
2
GND
OSC
TORQUE
DELAY
3
4
5
6
GATE
VDD
7
8
DESCRIPTION
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 VDRAIN > VTORQUE, the GATE output pulse drive must be disabled.
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.
7.5V
1µF
180K
TORQUE
LEVEL SET
100K
5.6K
TORQUE
200K
470K
TRIGGER
270K
1nF
VDD
+
330Ω
SW
+ CONTROL
- & LOGIC
GC
-
+
SPEED
CONTROL
OSCILLATOR
HIP9021
GND
VBATT
15K
DRAIN
3.3µF
DELAY
PORTABLE
ELECTRIC
DRILL MOTOR
GATE
OSC
1nF
RFP45N03L
N-CHANNEL
POWER
MOSFET
NOTE: The value chosen for the torque level set pot is dependent on the type of power MOSFET and motor characteristics.
The TRIGGER is a combined SW/Speed Control function. Motor speed increases as the TRIGGER voltage decreases.
Speed control range: 2.35V (Min) < VTRIGGER < 5.25V (Max)
FIGURE 2. TYPICAL OPERATING CIRCUIT SHOWING THE HIP9021IB AS AN N-CHANNEL MOSFET DRIVER IN A PORTABLE
BATTERY ELECTRIC DRILL APPLICATION
5
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| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet HIP9021.PDF ] | |
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