Pin Functionality; Pin Configuration (Top View) - Hyundai Q17 Technical & Service Manual

Q17 Technical Service Manual
ICE2BS01
MC68HC705BD7B
1 1 Pin Configuration and Functionality
1.1 Pin Configuration
Pin Symbol Function
1 N.C. Not connected
2 SoftS Soft Start & Auto Restart Control
3 FB Regulation Fedback
4 Isense Controller Current Sense Input
5 Gate Driver Output
6 VCC Controller Supply Voltage
7 GND Controller Ground
8 N.C. Not connected
Package P-DIP-8-4
G-Package P-DSO-8-3
N.C.
1
SoftS 2
3
FB
4
Isense
Figure 1

Pin Configuration (top view)

1.2
SoftS (Soft Start & Auto Restart Control)
This pin combines the function of Soft Start in case of
Start Up and Auto Restart Mode and the controlling of
the Auto Restart Mode in case of an error detection.
FB (Feedback)
The information about the regulation is provided by the
FB Pin to the internal Protection Unit and to the internal
PWM-Comparator to control the duty cycle.
Isense (Current Sense)
The Current Sense pin senses the voltage developed
on the series resistor inserted in the source of the
external Power Switch. When Isense reaches the
internal threshold of the Current Limit Comparator, the
Driver output is disabled. By this mean the Over
Current Detection is realized.
Furthermore the current information is provided for the
PWM-Comparator to realize the Current Mode.
Gate (Driver Output)
N.C.
8
The current and slew rate capability of this pin are
suited to drive Power MOSFETs.
7 GND
VCC (Power supply)
This pin is the positiv supply of the IC. The operating
6
VCC
range is between 8.5V and 21V.
To provide overvoltage protection the driver gets
5
disabled when the voltage becomes higher than 16.5V
Gate
during Start up Phase.
GND (Ground)
This pin is the ground of the primary side of the SMPS.
--17--

Pin Functionality