ML4803CS1 Fairchild Semiconductor, ML4803CS1 Datasheet - Page 7

• Manufacturer Part Number: ML4803CS1
• Description: Power Factor Correction ICs PFC Controller PWM Combo
• Manufacturer: Fairchild Semiconductor

Specifications of ML4803CS1

• Start-up Supply Current: 200uA
• Switching Freq: 67kHz
• Operating Supply Voltage (max): 18.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Package Type: SOIC N
• Pin Count: 8
• Mounting: Surface Mount
• Switching Frequency: 67 KHz
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Not Compliant

PRODUCT SPECIFICATION
REV. 1.1.3 8/3/01
R
R
∆V EAO +
C
C
COMP
COMP
ML4803
ZERO
ZERO
100
150
200
–
=
=
=
=
50
0
0.1
2
6 28
6.28
2
.
× π ×
× π ×
Figure 6. Voltage Loop Phase
Figure 4. Voltage Control Loop
POWER
×
×
STAGE
I OUT
3
30
10
f
Hz
f
1
×
1
1
1
Hz
1
C
×
×
220µF
COMP
R
FREQUENCY (Hz)
×
330
COMP
16
COMPENSATION
nF
kΩ
V O
10
R LOAD
667Ω
0.15µF
=
=
016
330
.
µF
Power Stage
Overall
Compensation
kΩ
11.3MΩ
Network
330kΩ
100
15nF
VEAO
1000
ML4803
I VEAO
35µA
Internal Voltage Ramp
PFC Current Sense Filtering
Figure 7. Internal Ramp Current vs. VEAO
50
40
30
20
10
–20
–40
–60
0
60
40
20
0
0
0.1
FF @ –55ºC
TYP @ –55ºC
TYP @ ROOM TEMP
TYP @ 155ºC
SS @ 155ºC
Figure 5. Voltage Loop Gain
1
2
1
FREQUENCY (Hz)
V EAO (V)
3
10
4
5
Power Stage
Overall Gain
Compensation
Network Gain
100
6
7
1000
ML4803
7