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PDF ICE3A1065L Data sheet ( Hoja de datos )
| Número de pieza | ICE3A1065L | |
| Descripción | (ICE3xxx65L) Off-Line SMPS Current Mode Controller | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ICE3A1065L (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
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Version 2.0, 8 May 2006
C o o l S E T ™ -F3
www.DataSheet4U.com
ICE3B0365L
ICE3A1065L
ICE3A1565L
Off-Line SMPS Current Mode
Controller with integrated 650V
Startup Cell/Depletion CoolMOS™
and Latched off Mode
Power Management & Supply
Never stop thinking.
1 page  
CoolSET™-F3
ICE3xxx65L
Pin Configuration and Functionality
1 Pin Configuration and Functionality
1.1 Pin Configuration with PG-DIP-8-6 1.2 Pin Functionality
Pin Symbol Function
1
2
www.DataSheet34U.com
SoftS
FB
CS
4 Drain
5 Drain
6 n.c.
7 VCC
8 GND
Soft-Start
Feedback
Current Sense/
650V1) Depl. CoolMOS™ Source
650V1) Depl. CoolMOS™ Drain
650V1) Depl. CoolMOS™ Drain
Not Connected
Controller Supply Voltage
Controller Ground
SoftS (Soft Start & Auto Restart Control)
The SoftS pin combines the functions of Soft Start
during Start Up and error detection for Auto Restart
Mode. These functions are implemented and can be
adjusted by means of an external capacitor at SoftS to
ground. This capacitor also provides an adjustable
blanking window for high load jumps, before the IC
enters into Auto Restart Mode.
FB (Feedback)
The information about the regulation is provided by the
FB Pin to the internal Protection Unit and to the internal
PWM-Comparator to control the duty cycle. The FB-
Signal controls in case of light load the Active Burst
Mode of the controller.
1) at Tj = 110°C
Package PG-DIP-8-6
CS (Current Sense)
The Current Sense pin senses the voltage developed
on the series resistor inserted in the source of the
integrated Depl. CoolMOS™. If CS reaches the internal
threshold of the Current Limit Comparator, the Driver
output is immediately switched off. Furthermore the
current information is provided for the PWM-
Comparator to realize the Current Mode.
SoftS
1
FB 2
CS 3
Drain
4
8 GND Drain (Drain of integrated Depl. CoolMOS™)
Pin Drain is the connection to the Drain of the internal
Depl. CoolMOSTM.
7 VCC
VCC (Power supply)
The VCC pin is the positive supply of the IC. The
6 n.c. operating range is between 8.5V and 21V.
GND (Ground)
The GND pin is the ground of the controller.
5 Drain
Figure 1 Pin Configuration PG-DIP-8-6(top view)
Note: Pin 4 and 5 are shorted within the DIP 8
package.
Version 2.0 5 8 May 2006
5 Page 
CoolSET™-F3
ICE3xxx65L
Functional Description
current. That means the propagation delay time
between exceeding the current sense threshold Vcsth
and the switch off of the internal CoolMOS™ is
compensated over temperature within a wide range.
Current Limiting is now possible in a very accurate way.
E.g. Ipeak = 0.5A with RSense = 2. Without Propagation
Delay Compensation the current sense threshold is set
to a static voltage level Vcsth=1V. A current ramp of
dI/dt = 0.4A/µs, that means dVSense/dt = 0.8V/µs, and a
propagation
www.DataSheelte4aUd.csomthen to
delay time of i.e.
an Ipeak overshoot
tPropagation
of 14.4%.
Delay =180ns
By means of
propagation delay compensation the overshoot is only
about 2% (see Figure 12).
V
1,3
1,25
1,2
1,15
1,1
1,05
1
0,95
0,9
0
with compensation
without compensation
0,2 0,4 0,6 0,8
1 1,2 1,4 1,6 1,8
dVSense
dt
2V
µs
3.6 Control Unit
The Control Unit contains the functions for Active Burst
Mode, Auto Restart Mode and Latched Off Mode. The
Active Burst Mode and the Auto Restart Mode are
combined with an Adjustable Blanking Window which is
depending on the external Soft Start capacitor. By
means of this Adjustable Blanking Window, the IC
avoids entering into these two modes accidentally.
Furthermore it also provides a certain time whereby the
overload detection is delayed. This delay is useful for
applications which normally works with a low current
and occasionally require a short duration of high
current.
3.6.1
Adjustable Blanking Window
SoftS
5kΩ RSoftS
6.5V
4.4V
1
S1 G2
&
G4
Figure 12 Overcurrent Shutdown
The Propagation Delay Compensation is realized by
means of a dynamic threshold voltage Vcsth (see Figure
13). In case of a steeper slope the switch off of the
driver is earlier to compensate the delay.
VOSC max. Duty Cycle
5.4V
4.8V
C3
C4
& Auto
Restart
G5 Mode
Active
Burst
Mode
VSense
Vcsth
off time
Propagation Delay t
Figure 13
Signal1
Signal2
t
Dynamic Voltage Threshold Vcsth
FB
1.30V
C6
&
G6
Control Unit
Figure 14 Adjustable Blanking Window
VSoftS is clamped at 4.4V by the closed switch S1 after
the SMPS is settled. If overload occurs VFB is
exceeding 4.8V. Auto Restart Mode can’t be entered as
the gate G5 is still blocked by the comparator C3. But
after VFB has exceeded 4.8V the switch S1 is opened
via the gate G2. The external Soft Start capacitor can
now be charged further by the integrated pull up
resistor RSoftS. The comparator C3 releases the gates
G5 and G6 once VSofts has exceeded 5.4V. Therefore
there is no entering of Auto Restart Mode possible
during this charging time of the external capacitor
Version 2.0 11 8 May 2006
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet ICE3A1065L.PDF ] | |
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