CS5124XD8 ON Semiconductor, CS5124XD8 Datasheet - Page 5

• Manufacturer Part Number: CS5124XD8
• Description: IC CTRLR PWM CURRENT MODE 8-SOIC
• Manufacturer: ON Semiconductor

Specifications of CS5124XD8

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 440kHz
• Duty Cycle: 85%
• Voltage - Supply: 7.6 V ~ 20 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 8-SOIC (3.9mm Width)
• Frequency-max: 440kHz
• Output Voltage: - 0.3 V to + 20 V
• Output Current: 200 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 440 KHz
• Operating Supply Voltage: 7.7 V to 20 V
• Maximum Operating Temperature: + 135 C
• Fall Time: 25 ns
• Minimum Operating Temperature: - 40 C
• Rise Time: 45 ns
• Synchronous Pin: No
• Topology: Flyback, Forward
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PIN #
1
2
3
4
5
6
7
8
I
UVLO
GATE
SENSE
BIAS
GND
V
V
Pin
SS
CC
FB
V
V
internally clamped at 15 V when the IC is in sleep mode.
Sleep and under voltage lockout pin. A voltage greater than 1.8 V causes the chip to “wake up” however the GATE
remains low. A voltage greater than 2.6 V on this pin allows the output to switch.
Soft−Start Capacitor Pin. A capacitor placed between SS and GROUND is charged with 10 mA and discharged with
10 mA. The Soft−Start capacitor controls both Soft−Start time and hiccup mode frequency.
Voltage Feedback Pin. The collector of an optocoupler is typically tied to this pin. This pin is pulled up internally by a
4.3 kW resistor to 5.0 V and is clamped internally at 2.9 V (2.65 V). If V
and GATE will stay high. If the V
Current Sense Pin. This pin is connected to the current sense resistor on the primary side. If V
GATE will go low if I
Gate Drive Output Pin. Capable of driving a 3.0 nF load. GATE is nominally clamped to 13.5 V.
Ground Pin.
CC
CC
Power Input Pin.
Clamp Output Pin. This pin will control the gate of an N−channel MOSFET that in turn regulates Vcc. This pin is
SENSE
= 195 mV (335 mV). If I
PACKAGE PIN DESCRIPTION
FB
pin is pulled < 0.49 V, GATE will stay low.
http://onsemi.com
5
SENSE
Description
> 275 mV (525 mV), Soft−Start will be initiated.
FB
is pulled > 4.0 V, the oscillator is disabled
FB
is floating, the