NCP1212_05 ONSEMI [ON Semiconductor], NCP1212_05 Datasheet - Page 5

• Manufacturer Part Number: NCP1212_05
• Description: Current Mode PWM Controller for Both Forward and Flyback Converters
• Manufacturer: ONSEMI [ON Semiconductor]

3. I
4. The output voltage is internally clamped by 13.5 V Zener.
ELECTRICAL CHARACTERISTICS
V
OSCILLATOR SECTION
CURRENT SENSE SECTION
SOFT−START SECTION
GATE DRIVER SECTION
IC POWER SUPPLY SECTION
BROWNOUT DETECT SECTION (BOK)
MAXIMUM DUTY CYCLE SECTION
CC
Oscillation Frequency, T
Oscillation Frequency, T
Frequency Change against Supply Voltage
Frequency Change against Temperature
Maximum Current Sense Input Threshold
Propagation Delay (Current Sense to Gate after LEB Blanking)
Leading Edge Blanking Time
Soft−Start Charge Current
Overload Timing Discharge Current (Note 3)
48% Duty Cycle Selection Input Voltage Threshold
82% Duty Cycle Selection Input Voltage Threshold
Gate Drive Sink Capability, V
Gate Drive Source Capability, V
Gate Drive Voltage (From 1.0 V to 11 V) Rise Time (C
Gate Drive Voltage (From 11 V to 1.0 V) Fall Time (C
V
V
V
Power Supply Current, before Startup (V
Power Supply Current, Operating
Power Supply Current, Shutdown (V
Brownout Input Threshold Voltage
Brownout Hysteresis Current
Maximum Duty Cycle at Soft−Start Pin Voltage between 2.1 V and 2.8 V
Maximum Duty Cycle at Soft−Start Pin Voltage Higher than 3.0 V
CC
CC
CC
SD
(V
(V
(2.1 V v V
(V
= 16 V unless otherwise noted.)
CC
CC
DMAX
Startup Threshold Voltage
Overvoltage Lockout Threshold
Undervoltage Lockout Threshold
is an internal current source not accessible externally.
= 13 V to 25 V, T
= 16 V, T
w 3.0 V)
DMAX
J
= −25
v 2.8 V)
°
J
J
J
C to 105
= 25
= 25
= 25
CC
°
°
°
C (DMAX = 48%, C
C (DMAX = 82%, C
C)
CC
= 15 V, V
Characteristic
°
C)
= 15 V, V
CC
= 15 V)
(For typical values T
CC
DRV
= 12 V)
DRV
= 1.0 V
= 5.0 V (Note 4)
T
T
= 1.0 nF)
= 1.0 nF)
L
L
= 1.0 nF, T
= 1.0 nF, T
http://onsemi.com
J
NCP1212
= 25°C, DMAX = 48%, for min/max values T
J
J
5
= 25
= 25
°
°
C)
C)
VCC
VCC
DF
DF
DMAX
DMAX
F
F
Symbol
I
VCC
SD
OSC−48
OSC−82
V
T
V
V
T
I
V
OSC−V
I
BOK
OSC−T
I
I
I
I
I
PLH
OH
BOK
LEB
SS
D48
D82
OL
T
T
C1
C2
C3
−I
CS
OVLO
UVLO
r
f
SS
TH
48
82
0.96
13.5
22.5
1.14
Min
5.0
8.5
81
72
15
38
47
79
−
−
−
−
−
−
−
−
−
−
−
−
−
J
= −25°C to +105°C,
0.02
0.15
1.21
Typ
150
300
100
300
5.0
1.0
8.0
2.5
3.0
3.0
3.0
90
80
20
25
25
15
25
10
45
48
82
Max
1.16
16.5
27.5
11.5
0.26
1.27
200
5.0
99
88
26
50
50
54
50
88
11
−
−
−
−
−
−
−
−
Unit
kHz
kHz
mA
mA
mA
mA
mA
mA
mA
mA
ns
ns
ns
ns
%
%
%
%
V
V
V
V
V
V
V