ICE3BRXX65J(Z)(G)
Application Note
5
2010-06-20
1 Introduction
The CoolSET
®
-F3R,
ICE3BRxx65J(Z)(G)
is the latest development of the CoolSET
®
-F3. It is a PWM
controller with power MOSFET and startup cell in a DIP or DSO package. The switching frequency is running
at 65 KHz and it targets for DVD player, set-top box, portable game console, auxiliary power supply, etc.
The
ICE3BRxx65J(Z)(G)
adopts the BiCMOS technology and provides a wider Vcc operating range up to
25V. It inherits the proven good features of CoolSET
®
-F3 such as the active burst mode achieving the lowest
standby power, the propagation delay compensation making the most precise current limit control in wide
input voltage range, etc. In addition, it also adds on some useful features such as built-in soft start time, built-
in basic with extendable blanking time for over load protection and built-in switching frequency modulation (
frequency jittering ), external auto-restart enable, etc.
2
List of Features
3 Package
The package for F3R ICE3BRXX65J Jitter mode product is DIP-8.
Figure 1
Pin configuration –
ICE3BRxx65J
1
at T
j
=110°C
650V avalanche rugged CoolSET
®
with built-in Startup Cell
Active Burst Mode for lowest Standby Power
Fast load jump response in Active Burst Mode
65 kHz internally fixed switching frequency
Auto Restart Protection Mode for Over-load, Open Loop, Vcc Undervoltage, Over temperature & Vcc
Over-voltage
Built-in Soft Start
Built-in blanking window with extendable blanking time for short duration high current
External auto-restart enable pin
Max Duty Cycle 75%
Overall tolerance of Current Limiting < ±5%
Internal PWM Leading Edge Blanking
BiCMOS technology provides wide VCC range
Built-in Frequency jitter feature and soft driving for low EMI
Pin Name
Description
1
BA
extended Blanking & Auto-restart enable
2 FB
FeedBack
3 CS
Current Sense / 650V
1
CoolMOS
®
Source
4 Drain
650V
1
CoolMOS
®
Drain
5
Drain
650V
1
CoolMOS
®
Drain
6
n.c.
Not Connected
7 VCC
Controller
Supply
Voltage
8 GND
Controller
Ground
1
6
7
8
4
3
2
5
GND
BA
FB
CS
VCC
n.c
Drain
Drain