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PDF CXA3820M Data sheet ( Hoja de datos )
| Número de pieza | CXA3820M | |
| Descripción | AC-DC Controller | |
| Fabricantes | Sony | |
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AC-DC Controller
CXA3820M
Description
The CXA3820M has optimum configuration to realize various power supply circuits easily and compactly by
including Power-factor correction, resonant controller and various protection function in one package.
(Applications: Power supply circuit, etc.)
Features
Power-factor correction
Multiplierless critical conduction mode (CRM) control
Supports W/W input
Restart timer
Maximum frequency limit (during overcurrent detection)
Continuous overcurrent detection protection function
Resonant controller
Timer-latch over current protection
Soft start function
Adjustment minimum frequency limit
Pulse over current load detection
Common
Adjacent 2-pin short protection
Various protection functions including overvoltage and overcurrent
AC off detection
PFC-OK signal output
Structure
BiCMOS silicon monolithic IC
Package
24-pin SOP
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license
by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating
the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
-1-
E09X11
1 page  
CXA3820M
Pin Table
Pin
No.
Pin name
Description
Connection end
of protective
element
1 PFC_OUT
PFC MOSFET gate driver output
—
2 MODE
Mode determination
VCC, SGND
3 AC_DETIN
AC voltage sense input
VCC, SGND
4 AC_VRMS
AC peak voltage sense and PFC enable
VCC, SGND
5 PFC_ZCD
PFC zero current detect input
VCC, SGND
6 PFC_CS
PFC current sense input
VREF, SGND
7 PFC_VAO
PFC voltage control error amplifier output
VREF, SGND
8 PFC_VSENSE PFC output voltage sense input
VREF, SGND
9 PFC_OVP
PFC output overvoltage sense input
VREF, SGND
10 PFC_TONMAX PFC maximum ON time control
VREF, SGND
11 RM_OFFADJ
Resonant controller stop voltage adjustment and abnormal
latch input
VREF, SGND
12 RM_FMIN
Resonant controller minimum frequency setting
VREF, SGND
13 RM_SS
Resonant controller soft start and overcurrent timer-latch
setting
VREF, SGND
14 RM_CS
Resonant controller current sense input
VREF
15 RM_CSGND
Resonant controller current sense ground
VREF
16 RM_RT
Resonant controller frequency control
VREF, SGND
17 VREF
Internal supply voltage
VCC, SGND
18 SGND
Signal ground
(PGND)
19 PGND
PFC, RM driver ground
(SGND)
20 VCC
Power supply input
SGND
21 PFC_OK
PFC-OK signal output
—
22 RM_OUTN
Resonant controller Low-side MOSFET driver output
—
23 AC_DETOUT AC off detect signal output
—
24 RM_OUTP
Resonant controller High-side MOSFET driver output
—
-5-
5 Page 
CXA3820M
4. AC Input Detection Circuit Block (AC_DETIN pin)
Item
PFC operation start
and stop voltage
Hysteresis
AC detection reference
voltage High 1
AC detection reference
voltage Low 1
AC detection reference
voltage High 2
AC detection reference
voltage Low 2
AC off detection delay
time 1
AC off detection delay
time 2
AC off detection delay
time 3
AC off detection delay
time 4
Symbol
Vpfcon
Vpfcoff
Vpfchys
Vthach1
Vthacl1
Vthach2
Vthacl2
Tdlyac1
Tdlyac2
Tdlyac3
Tdlyac4
Measurement conditions
AC_DETIN peak voltage (rise)
AC_DETIN peak voltage (fall)
Vpfcon – Vpfcoff
AC_VRMS = 7.5V
AC_VRMS = 7.5V
AC_VRMS = 2.0V
AC_VRMS = 2.0V
AC_DETIN < AC_VRMS 55%
(State A)
AC_VRMS 80% > AC_DETIN
> AC_VRMS 55% (State B1)
AC_VRMS 80% > AC_DETIN
> AC_VRMS 55% (State B2)
AC_DETIN > AC_VRMS 80%
(State C)
Min.
1.85
1.65
0.17
5.8
3.925
1.4
0.9
4
4
6.4
20
Typ.
1.95
1.75
0.20
6.0
4.125
1.6
1.1
5
5
8
25
Max.
2.05
1.85
0.23
6.2
4.325
1.8
1.3
6
6
9.6
30
Unit
V
V
V
V
V
V
V
ms
ms
ms
ms
5. AC Off Detect Signal Output Circuit Block (AC_DETOUT pin)
Item
Output Low voltage
Output High voltage
Symbol
Measurement conditions
Vacoutl VCC = 18V, Iout = 10mA
Vacouth VCC = 18V, Iout = –10mA
Min. Typ. Max. Unit
— 0.5 1.0 V
17.0 17.5 — V
6. MODE Pin Voltage Detection Circuit Block (MODE pin)
Item
Symbol
Measurement conditions
MODE detection
voltage Low
Vmodel
MODE detection
voltage High
Vmodeh
Internal pull-up resistor Rmode MODE = 0.1V
Min. Typ. Max. Unit
5.2 — 5.6 V
7.6 — 8.4 V
35 50 65 k
7. Clock Timer
Item
1ms clock
Symbol
Tclock
Measurement conditions
Min. Typ. Max. Unit
972 1024 1075 s
- 11 -
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CXA3820M.PDF ] | |
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