KA3511DS Fairchild Semiconductor, KA3511DS Datasheet - Page 4

• Manufacturer Part Number: KA3511DS
• Description: IC PWM/SECONDARY COMBO 22-DIP
• Manufacturer: Fairchild Semiconductor

Specifications of KA3511DS

• Pwm Type: Current Mode
• Number Of Outputs: 3
• Frequency - Max: 10kHz
• Duty Cycle: 50%
• Voltage - Supply: 14 V ~ 30 V
• Buck: No
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -25°C ~ 85°C
• Package / Case: 22-DIP (0.400", 10.16mm)
• Frequency-max: 10kHz
• Topology: Push-Pull
• Output Voltage: 40 V
• Output Current: 200 mA
• Switching Frequency: 10 KHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Fall Time: 50 ns
• Mounting Style: Through Hole
• Rise Time: 100 ns
• Synchronous Pin: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin
No.
10
11
12
13
14
15
16
17
18
19
20
21
22
1
2
3
4
5
6
7
8
9
COMP
E/A(+)
TREM
Name
E/A(-)
REM
T
GND
DET
V3.3
DTC
V
T
Vref
V12
CT
PG
RT
PT
C2
C1
V5
UVP
E
CC
PG
Supply voltage. Operating range is 14V~30V. V
Error amplifier output. It is connected to non-inverting input of pulse width
modulator comparator.
Error amplifier inverting input. Its reference voltage is always 1.25V.
Error amplifier non-inverting input feedback voltage.This pin may be used to
sense power supply output voltage.
Remote on/off delay. Ton/Toff=8ms/24ms (Typ.) with C=0.1µF. Its high/low
threshold voltage is 1.8V/0.6V.
Remote on/off input. It is TTL operation and its threshold voltage is 1.4V. Voltage
at this pin can reach normal 4.6V, with absolutely maximum voltage, 5.25V. If
REM = “Low”, PWM = “Low”. That means the main SMPS is operational. When
REM = “High”, then PWM = “High” and the main SMPS is turned-off.
Oscillation frequency setting R. (Test Condition R
Oscillation frequency setting C. (Test Condition C
Under-voltage detect pin. Its threshold voltage is 1.25V Typ.
PG delay. Td=250ms (Typ) with C
1.8V/0.6V and the voltage of Pin10 is clamped at 2.9V for noise margin.
Power good output signal. PG = “High” means that the power is “Good” for
operation and PG = “Low” means “Power fail”.
Precision voltage reference trimmed to 2%. (Typical Value = 5.03V)
Over voltage protection for output 3.3V. (Typical Value = 4.1V)
Over voltage protection for output 5V. (Typical Value = 6.2V)
Over voltage protection for output 12V. (Typical Value = 14.2V)
This is prepared for an extra OVP input or another protection signal. (Typical
Value = 1.25V)
Timing pin for under voltage protection blank-out time. Its threshold voltage is
1.8V and clamped at 2.9V after full charging. Target of delay time is 250ms and
it is realized through external (C=2.2µF).
Signal ground.
Deadtime control input. The dead-time control comparator has an effective
120mV input offset which limits the minimum output dead time. Dead time may
be imposed on the output by setting the dead time control input to a fixed
voltage, ranging between 0V to 3.3V.
Output drive pin for push-pull operation.
Power ground.
Output drive pin for push-pull operation.
4
PG
Function
=2.2µF. The high/low threshold voltage are
CC
T
T
=10k )
=0.01µF)
=20V, Ta=25 ° C at test.
Rev C, November 1999