ICE1PCS01XK Infineon Technologies, ICE1PCS01XK Datasheet - Page 8

• Manufacturer Part Number: ICE1PCS01XK
• Manufacturer: Infineon Technologies

Specifications of ICE1PCS01XK

• Start-up Supply Current: 100uA
• Operating Supply Voltage (max): 21V
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Package Type: PDIP
• Pin Count: 8
• Mounting: Through Hole
• Lead Free Status / RoHS Status: Compliant

3.4
The IC provides several protection features in order to
ensure the PFC system in safe operating range.
Depending on the input line voltage (V
bus voltage (V
when these protections are active.
Figure 6
Figure 7
The following sections describe the functionality of
these protection features.
3.4.1
Brown-out occurs when the input voltage V
the minimum input voltage of the design (i.e. 85V for
universal input voltage range) and the VCC has not
entered into the V
BOP, the boost converter will increasingly draw a
higher current from the mains at a given output power
which may exceed the maximum design values of the
input current. The ICE1PCS01/G limits internally the
current drawn from the mains and therefore also limits
the input power. The difference of input and output
power will result in decreasing output voltage. If the
condition prolongs, the decreasing V
in output under voltage condition (OUV, 50% of rated),
and the IC will be shut down (See section 3.4.5).
Figure 8 shows the occurrence of BOP in respect to the
ISENSE voltage.
Version 1.2
IC’s
State
V
(1)
IN
V
(VAC)
INMIN
V
OUT,Rated
OLP
V
System Protection
Brown-Out Protection (BOP)
OUT
where BOP activates depends on the output power
V
V
IN
OUT
OUT
Normal
Operation
Related Protection Features
V
Related Protection Features
), Figure 6 and 7 show the conditions
CCUVLO
INMIN
VCC > V
(1)
PCL / SOC
OVP
level yet. For a system without
CCUVLO
BOP
OUV
OUT
IC OFF
IN
VCC<V
will terminate
OLP
) and output
IN
105%
100%
50%
16%
falls below
CCUVLO
t
t
8
Figure 8
The V
voltage at ISENSE and thus the output power. The
rated output power with a minimum V
Due to the internal parameter tolerance, the maximum
power with V
And the BOP takes over the normal operation under
rated output power latest at an input voltage of
3.4.2
The IC is designed not to support any output power
that corresponds to a voltage lower than -0.73V at the
ISENSE pin. A further increase in the inductor current,
which results in a lower ISENSE voltage, will activate
the Soft Over Current Control (SOC). This is a soft
control as it does not directly switch off the gate drive
like the PCL. It acts on the nonlinear gain block to result
in a reduced PWM duty cycle.
3.4.3
The IC provides a cycle by cycle peak current limitation
(PCL). It is active when the voltage at pin 3 (ISENSE)
reaches -1.08V. This voltage is amplified by OP1 by a
factor of -1.43 and connected to comparator C2 with a
reference voltage of 1.5V as shown in Figure 9. A
deglitcher with 300ns after the comparator improves
noise immunity to the activation of this protection.
P
P
V
OUT
OUT
BOPMAX
IC’s
State
IN
(
(
rated
max
threshold for BOP to occur is dependent on the
0
Soft Over Current Control (SOC)
Peak Current Limit (PCL)
Normal
Operation
)
=
P
BOP, SOC and PCL Protection as function
of V
)
OUT
INMIN
=
P
=
OUT
(rated)
V
ISENSE
V
INMIN
before BOP occurs is
INMIN
-0.6V -0.73V
(
rated
(BOP occurs at V
Functional Description
×
×
------------------ -
R1
)
------------------ -
R1
×
0.73
P
OUT
0.6
R1
------------------ -
⋅
BOP
SOC
⋅
0.73
(max)
2
⋅
2
ICE1PCS01/G
ISENSE
-1.08V
2
IN
= -0.6V Max)
PCL
CCM-PFC
(V
06 Feb 2007
INMIN
V
) is
ISENSE