KA3511 データシートの表示（PDF） - Fairchild Semiconductor
部品番号
コンポーネント説明
メーカー
KA3511 Datasheet PDF : 21 Pages
| |||
INTELLIGENT VOLTAGE MODE PWM IC
KA3511/D
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12(14)
13(15)
14(16)
15(17)
16(18)
17(19)
18(20)
19(21)
20(22)
21(23)
22(24)
Name
VCC
COMP
E/A(-)
E/A(+)
TREM
REM
RT
CT
DET
TPG
PG
Vref
V3.3
V5
V12
PT
TUVP
GND
DTC
C2
E
C1
Function
Supply voltage. Operating range is 14V~30V. VCC=20V, Ta=25°C at test.
Error amplifier output. It is connect 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=0.1uF. 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 RT=10kΩ)
Oscillation frequency setting C. (Test Condition CT=0.01uF)
Under-voltage detect pin. Its threshold voltage is 1.25V Typ.
PG delay. Td=250ms (Typ) with CPG=2.2uF. The high/low threshold voltage are 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=2.2uF).
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.
Share Link: 