KA3844BD Fairchild Semiconductor, KA3844BD Datasheet - Page 5

• Manufacturer Part Number: KA3844BD
• Description: Current Mode PWM Controllers PWM Control IC
• Manufacturer: Fairchild Semiconductor

Specifications of KA3844BD

• Number Of Outputs: 1
• Duty Cycle (max): 50 %
• Output Current: 1000 mA
• Mounting Style: SMD/SMT
• Package / Case: SOP-14
• Switching Frequency: 500 KHz
• Maximum Operating Temperature: + 70 C
• Fall Time: 35 ns
• Minimum Operating Temperature: 0 C
• Rise Time: 45 ns
• Synchronous Pin: No
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

During Under-Voltage Lock-Out, the output driver is biased to a high impedance state. Pin 6 should be shunted to ground with
a bleeder resistor to prevent activating the power switch with output leakage current.
Peak current (I
A small RC filter may be required to suppress switch transients.
I
S
MAX
=
1.0V
----------- -
R
S
S
) is determined by the formula:
Figure 3. Error Amp Configuration
Figure 2. Under Voltage Lockout
Figure 4. Current Sense Circuit
KA3842B/KA3843B/KA3844B/KA3845B
5