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PDF ICE3A1065ELJ Data sheet ( Hoja de datos )
| Número de pieza | ICE3A1065ELJ | |
| Descripción | Off-Line SMPS Current Mode Controller | |
| Fabricantes | Infineon | |
| Logotipo |  |
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Version 2.3, 19 Nov 2012
C o o l S E T ®- F 3
ICE3A1065ELJ
Off-Line SMPS Current Mode
Controller with integrated 650V
CoolMOS® and Startup Cell
(Latched and frequency jitter
Mode)
Power Management & Supply
Never stop thinking.
1 page  
CoolSET®-F3
ICE3A1065ELJ
6 Outline Dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
8 Schematic for recommended PCB layout . . . . . . . . . . . . . . . . . . . . . . . .27
Version 2.3
5 19 Nov 2012
5 Page 
3.4 Startup Phase
Soft Start counter
CoolSET®-F3
ICE3A1065ELJ
Functional Description
SoftS
Soft Start
Soft Start
Soft-Start
Comparator
Gate Driver
C7 &
G7
VSoftS
V SoftS 2
V SoftS 1
0.6V
x3.2
PWM OP
Figure 10 Soft Start Phase
CS 5V
SoftS
RSoftS
Figure 9 Soft Start
In the Startup Phase, the IC provides a Soft Start
period to control the maximum primary current by
means of a duty cycle limitation. The Soft Start function
is a built-in function and it is controlled by an internal
counter.
When the VVCC exceeds the on-threshold voltage, the
IC starts the Soft Start mode. The function is realized
by an internal Soft Start resistor, a current sink and a
counter. And the amplitude of the current sink is
controlled by the counter.
Soft Start 32I 8I 4I 2I
Counter
I
Figure 11 Soft Start Circuit
After the IC is switched on, the VSoftS voltage is
controlled such that the voltage is increased step-
wisely (32 steps) with the increase of the counts. The
Soft Start counter would send a signal to the current
sink control in every 600us such that the current sink
decrease gradually and the duty ratio of the gate drive
increase gradually. The Soft Start will be finished in
20ms after the IC is switched on. At the end of the Soft
Start period, the current sink is switched off.
Version 2.3
11 19 Nov 2012
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet ICE3A1065ELJ.PDF ] | |
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