CDB1601-120W-Z Cirrus Logic Inc, CDB1601-120W-Z Datasheet - Page 13

• Manufacturer Part Number: CDB1601-120W-Z
• Description: High-efficiency PFC Demo. Board
• Manufacturer: Cirrus Logic Inc
• Series: -r

Specifications of CDB1601-120W-Z

• Silicon Manufacturer: Cirrus Logic
• Kit Application Type: Power Management
• Application Sub Type: Power Factor Correction (PFC)
• Kit Contents: Board, Datasheet
• Design Resources: CS150x/160x PCB Layout Guidelines
• Featured Product: CS1501/CS1601 Power Factor Correction IC Controllers
• Main Purpose: Power Management, Power Factor Correction
• Embedded: No
• Utilized Ic / Part: CS1601
• Primary Attributes: 108 ~ 305 VAC Input, 460V 120W Output
• Secondary Attributes: Ballast Control, Up to 2 T5 Lamps
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.11 Overpower Protection
The CS1601 incorporates an internal Overpower Protection
(OPP) algorithm. This provides protection from overload
conditions. This algorithm uses the condition that output
power is a function of the boost inductor (Section 5.4).
Under moderate overload, V
maintaining rated power and PFC. Further increasing the load
current causes V
(~360V). Below this threshold, the circuit changes its
operating mode to startup with more power available to raise
V
canceled and power is now limited to the rated value. If the
overload is still present, this cycle will repeat.
If a sustained overload, or a repeated cycle of overload events
is detected for greater than 112 mS, the CS1601 shuts down
for 2.5 seconds, then attempts to restart.
5.12 Open/Short Loop Protection
If the PFC output sense resistor, R
GND), the measured output voltage decreases at a slew rate of
about 2 V/s, which is determined by the ADC sampling rate.
The IC stops the gate drive when the measured output voltage is
lower than the measured line voltage. The IC resumes gate drive
switching when the current into the IFB pin becomes larger than
or equal to the current into the IAC pin and V
the peak of the line voltage (V
time of open/short loop protection for R
If the PFC input sense resistor R
the current reference signal supplied to the IC on pin IAC falls to
zero.
DS931PP6
link
. As V
link
reaches its nominal value, startup mode is
link
to drop below the startup threshold
link
rect(pk)
IAC
may droop up to 10% while
fails (open or short to GND),
IFB
). The maximum response
IFB
, fails (open or short to
is about 150s.
link
is greater than
5.13 Internal Overtemperature Protection
An internal thermal sensor triggers a shutdown when the
temperature exceeds 135°C (nominal) on the silicon. The
sensor sends a signal to the core that supplies current to all
internal digital logic, cutting off power from them. Once the
temperature of the IC has dropped by 9°C (nominal), the
sensor resets, allowing power to the logic.
5.14
The standby (STBY) pin provides a means by which an
external signal can cause the CS1601 to enter a non-
operating, low-power state. The STBY input is intended to be
driven by an open-collector/open-drain device. Internal to the
pin, there is a pull-up resistor connected to the V
shown in Figure 23. Since the pull-up resistor has a high
impedance, the user may need to provide a filter capacitor (up
to 1000pF) on this pin.
When the STBY pin is not used, it is recommended that the pin
be tied to V
Standby (STBY) Function
DD
Figure 23. STBY Pin Connection
(pulled high).
See Text
<1 nF
STBY
2
8
6
GND
VDD
600k
CS1601
CS1601
DD
pin as
13