參數(shù)資料
型號： NCP1212PG
廠商： ON SEMICONDUCTOR
元件分類： 穩(wěn)壓器
英文描述： Current Mode PWM Controller for Both Forward and Flyback Converters
中文描述： 1 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDIP8
封裝： LEAD FREE, PLASTIC, DIP-8
文件頁數(shù)： 5/22頁
文件大?。?/td> 200K
代理商： NCP1212PG
NCP1212
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS
(For typical values T
J
= 25
°
C, DMAX = 48%, for min/max values T
J
= 25
°
C to +105
°
C,
V
CC
= 16 V unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
OSCILLATOR SECTION
Oscillation Frequency, T
J
= 25
°
C (DMAX = 48%, C
T
= 1.0 nF)
F
OSC48
81
90
99
kHz
Oscillation Frequency, T
J
= 25
°
C (DMAX = 82%, C
T
= 1.0 nF)
F
OSC82
72
80
88
kHz
Frequency Change against Supply Voltage
(V
CC
= 13 V to 25 V, T
J
= 25
°
C)
F
OSCV
0.02
%
Frequency Change against Temperature
(V
CC
= 16 V, T
J
= 25
°
C to 105
°
C)
F
OSCT
5.0
%
CURRENT SENSE SECTION
Maximum Current Sense Input Threshold
V
CS
0.96
1.0
1.16
V
Propagation Delay (Current Sense to Gate after LEB Blanking)
T
PLH
150
200
ns
Leading Edge Blanking Time
T
LEB
300
ns
SOFTSTART SECTION
SoftStart Charge Current
I
SS
5.0
8.0
11
A
Overload Timing Discharge Current (Note 3)
I
SD
I
SS
15
20
26
A
48% Duty Cycle Selection Input Voltage Threshold
V
D48
2.5
V
82% Duty Cycle Selection Input Voltage Threshold
V
D82
3.0
V
GATE DRIVER SECTION
Gate Drive Sink Capability, V
CC
= 15 V, V
DRV
= 1.0 V
I
OL
100
mA
Gate Drive Source Capability, V
CC
= 15 V, V
DRV
= 5.0 V (Note 4)
Gate Drive Voltage (From 1.0 V to 11 V) Rise Time (C
L
= 1.0 nF, T
J
= 25
°
C)
I
OH
300
mA
T
r
25
50
ns
Gate Drive Voltage (From 11 V to 1.0 V) Fall Time (C
L
= 1.0 nF, T
J
= 25
°
C)
T
f
25
50
ns
IC POWER SUPPLY SECTION
V
CC
Startup Threshold Voltage
VCC
TH
13.5
15
16.5
V
V
CC
Overvoltage Lockout Threshold
VCC
OVLO
22.5
25
27.5
V
V
CC
Undervoltage Lockout Threshold
VCC
UVLO
8.5
10
11.5
V
Power Supply Current, before Startup (V
CC
= 12 V)
I
C1
0.15
0.26
mA
Power Supply Current, Operating
I
C2
3.0
5.0
mA
Power Supply Current, Shutdown (V
CC
= 15 V)
I
C3
3.0
mA
BROWNOUT DETECT SECTION (BOK)
Brownout Input Threshold Voltage
V
BOK
1.14
1.21
1.27
V
Brownout Hysteresis Current
I
BOK
38
45
54
A
MAXIMUM DUTY CYCLE SECTION
Maximum Duty Cycle at SoftStart Pin Voltage between 2.1 V and 2.8 V
(2.1 V
V
DMAX
2.8 V)
DMAX
48
47
48
50
%
Maximum Duty Cycle at SoftStart Pin Voltage Higher than 3.0 V
(V
DMAX
3.0 V)
DMAX
82
79
82
88
%
3. I
SD
is an internal current source not accessible externally.
4. The output voltage is internally clamped by 13.5 V Zener.
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