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400EACBA0 Datenblatt(PDF) 4 Page - ON Semiconductor

Teilenummer 400EACBA0
Bauteilbeschribung  Fixed Frequency Current Mode Controller for Flyback Converters
PDF  47 Pages
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Hersteller  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

400EACBA0 Datenblatt(HTML) 4 Page - ON Semiconductor

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NCP12400
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4
SIMPLIFIED INTERNAL BLOCK SCHEMATIC
Figure 2. Simplified Internal Block Schematic
freq folback
jittering
Skip _CMP
SkipB
4uMho
Ramp_OTA
CSref
Soft Start timer
Reset
Q
Set
Qb
Clamp
Fault timer
TSD
FB
CS
DRV
GND
VCC
Fault
Ilimit_CMP
PWM_CMP
SoftStart_CMP
LEB 250 ns
LEB 120 ns
CSstop_CMP
TSD
Latch
Enable
RESET
SS _end
Ilimit
Vfb(reg)
MAX_ton
MAX_ton
Brown_Out
Reset
Q
Set
Qb
PWM
IC stop
V to I
Iopc = 0.5u*(Vhv −125)
Off_mode_CMP1
ICstart
FBbuffer
VCC
UVLO_CMP
FAULT
VccOVP
OTP
OTP_CMP
OVP_CMP
HV
Brown_In
VccOVP_CMP
Vdd
Set
Q
Rese t Qb
Latch
Brown_Out
RESET
OVP
AC_Off
UVLO
VCC
Vcc_Int
IC stopB
Vhv DC sample
OM & X2 & Vcc
Vdd reg
Vdd
Vcc regulator
PowerOnReset _CMP
control
Dual HV
start −up
current source
TSD
RESET
Vfb < 1.64 V fix current setpoint 210mV
X 2 discharge
11 V regulator
ON_CMP
STOP_CMP
VccON
VccMIN
GoToOffMode timer 500ms
Set
Q
Reset Qb
Off_mode_CMP2
FM input
OSC 65kHz
PFM input
Square output
Saw output
ton_max output
3. 0V
Vdd
4 events timer
LEB 1 us
OVP_CMP
DRV
4 events timer
600ns timer
55 us
Filter
300 us
Filter
10 us
Filter



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