FAN7554DTF Fairchild Semiconductor, FAN7554DTF Datasheet - Page 12

• Manufacturer Part Number: FAN7554DTF
• Description: IC CTRLR PWM CURRENT MODE 8SOIC
• Manufacturer: Fairchild Semiconductor

Specifications of FAN7554DTF

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 500kHz
• Duty Cycle: 98%
• Voltage - Supply: 9 V ~ 30 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -25°C ~ 85°C
• Package / Case: 8-SOIC (3.9mm Width)
• Frequency-max: 500kHz
• Output Current: 1 A
• Switching Frequency: 500 KHz
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: FAN7554DTFTR; FAN7554DTF_NL; FAN7554DTF_NLTR; FAN7554DTF_NLTR

FAN7554
12
Cs
Cs
0.3~3V
0.3~3V
V
V
0.3V
0.3V
Vref
Vref
1.5V
1.5V
Vfb
Vfb
S/S
S/S
5V
5V
5V
5V
Vo
Vo
Normal State
Normal State
Cfb
Cfb
S/S
S/S
FB
FB
Remote control
Remote control
1
1
2
2
0.3V
0.3V
Vcc
Vcc
Figure 20. ON-OFF Control Circuit Waveforms
Slope (dv/dt) = 1k * Cs
Slope (dv/dt) = 1k * Cs
5uA
5uA
OFF Signal
OFF Signal
Vref
Vref
Slope (dv/dt) = (1mA +100uA) / Cs
Slope (dv/dt) = (1mA +100uA) / Cs
Figure 19. ON/OFF Control Circuit
100uA
100uA
Slope (dv/dt) = (1mA +5A) / Cfb
Slope (dv/dt) = (1mA +5A) / Cfb
1K
1K
Slope (dv/dt) = 100uA / Cs
Slope (dv/dt) = 100uA / Cs
Slope (dv/dt) = (5uA) / Cfb
Slope (dv/dt) = (5uA) / Cfb
3.5V
3.5V
1.5V
1.5V
OFF State
OFF State
ON Signal
ON Signal
OFF
OFF
ON
ON
S
S
Q
Q
PWR
PWR
SAVE
SAVE
R
R
/
/
Internal bias
Internal bias
5V
5V
Vref
Vref
Good logic
Good logic
Normal State
Normal State
UVLO
UVLO
VCC
VCC
3V
3V
FAN7554
FAN7554
7
7
0.2mA
0.2mA
4.5mA
4.5mA
Icc
Icc
15V/9V
15V/9V
t t t
t t t
t
t
t t t
t t t
t t
t t