ML4812IQ Fairchild Semiconductor, ML4812IQ Datasheet - Page 6

• Manufacturer Part Number: ML4812IQ
• Description: IC POWER FACTOR CTRLR 20-PLCC
• Manufacturer: Fairchild Semiconductor

Specifications of ML4812IQ

• Mode: Critical Conduction (CRM)
• Current - Startup: 800µA
• Voltage - Supply: 12 V ~ 18 V
• Mounting Type: Surface Mount
• Package / Case: 20-PLCC
• Switching Frequency: 105 KHz
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 65 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ML4812
Functional Description
Oscillator
6
EXTERNAL
CLOCK
RAMP VALLEY
RAMP PEAK
R SYNC
C SYNC
CLOCK
Figure 1. Oscillator Block Diagram
V(C T )
I SET
R T
C T
10
16
9
SYNC
R T
C T
8.4mA
t D
Q
1
I SET
5.6V
Q
2
+
-
Figure 3. Output Saturation Voltage vs. Output Current
Figure 2. Oscillator Timing Resistance vs. Frequency
10
8
5
3
2
1
10
10nF
20nF
15
14
13
3
2
1
0
0
SOURCE SATURATION
V CC
LOAD TO GROUND
SINK SATURATION
OSCILLATOR FREQUENCY (kHz)
LOAD TO V CC
5nF
200
OUTPUT CURRENT (mA)
2nF
100
400
PRODUCT SPECIFICATION
1nF
80 s PULSED LOAD
90%
120Hz RATE
V CC = 15V
REV. 1.0.4 5/31/01
600
1000
GND
85%
80%
70%
800