IP3101
September. 2003
- 1 -
http://www.interpionsemi.com
Versatile Gate Driver
The IP3101 provides simple and high performance
control functions for the half bridge L/C resonant sys-
tem, specially electronic ballast . It internally inte-
grated the essential functions of the half bridge L/C
resonant system so the conventional system can be
realized a minimum board area, small external com-
ponents and low power dissipation.
Internally integrated soft-start circuit eliminated the
need for external soft-start circuit. And the initial pre-
heating switching frequency and preheating time can
be easily programmable with only one capacitor
(preheating frequency capacitor) and one resistor
(preheating time capacitor) depending on the types of
lamps. Also the normal operating frequency can be
easily adjusted by timing resistor (Rt) and timing ca-
pacitor (Ct).
The cold cathode current can be limited by changing
the normal operating frequency to soft-start frequency
with an external small signal transistor. No lamp pro-
tection or any required protection like over current
protection can be realized by adding an external
small signal transistor.
- Internal Soft Start
- Programmable Soft Start Frequency
- Programmable Preheating Time
- Very Precision Internal Operating Frequency(+5%)
- No Lamp Protection or Over Current Protection
- Precision Internal Reference Voltage
- 8DIP, 8SOP Packages
Device
Package
Operating Temp
IP3101
8DIP
I3101
8SOP
-25
°C ~ 125°C
DESCRIPTIONS
BLOCK DIAGRAM
ORDER INFORMATIONS
FEATURES
8SOP
8DIP
Vcc
Vcc
OUTPUT
LOGIC
OSCILLATOR
Shutdown
UVLO
(10V/8V)
6
7
8
Pre-Heat
Oscillator
Reference
Output
UVLO
5
1
4
3
I(CT)
I(CT)=I(RT)+I(PHF)
Ichg
Idis
I(RT)
I(PHF)
PHF
RT
2
CT
PHT
GND
LO
HO
VCC
Voltage
Reference
(Vz,Vref)
Vz
Ipht
Iss
1.0V
Protection
Comparator
Delay Timer
OSC, PHT,
HO,LO
Iss
1.5V
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