Digital PFC Controllers Power Factor Correction IC for Power Supplies D1
LB
V DD BR1
R1
BR1
R3
R5 R6
R2
CS1501/1601
57
(actual size: 5 mm x 5 mm)
AC Mains
8 VDD
ZCD
IAC
STBY
2 BR1
BR1
IFB
GND
Q1
GD
CS1501 CS1601 CS1601H
C1 3
1
C2 CS
Regulated DC Output
4
6
R4
R7
DTV Overview:
LED POWER SUPPLY
The CS1501/1601 are high-performance Variable
Variable on-time/ variable frequency algorithm is
Frequency Discontinuous Mode, active digital power
used in achieving close to unity power factor and
factor correction (PFC) controllers. They feature Cirrus
spreading the EMI frequency spectrum, thus reducing
Logic’s EXL Core technology that brings innovative
the conducted EMI filtering requirements. The
digital energy control which elevates performance
feedback loop is closed through an integrated
and reduces total solution size.
compensation network within the IC, eliminating the
®
The unique digital architecture of our PFC controllers enables a reduction in the boost inductor value (LB), the size of the EMI filter stage and many external Cirrus Logic, Inc. 2901 Via Fortuna
passive components.
need for additional external components. Protection features (such as overvoltage, overcurrent, overpower, open and short circuit protection, over temperature, and brownout) help protect the device during abnormal transient conditions.
Austin, Texas 78746 United States T +1-512-851-4000 F +1-512-851-4977 Toll-Free +1-800-888-5016 Sales Support North America +1 800-625-4084 Asia Pacific +852 2376-0801 Japan +81 (3) 5226-7757 Europe/UK +44 (90) 1628-891-300
FEATURES: • Superior light-load efficiency, top-end power factor correction, unsurpassed THD
• Overvoltage protection
• Smaller boost inductance needed versus critical conduction mode (CRM)
• UVLO with wide hysteresis
• Digital EXL Core enables intelligent and adaptive switching • Pin-out similar to top analog CRM solutions • Current sense and zero crossing detect (ZCD) functionality added • Brownout protection
learn more at
www.cirrus.com
• Overpower protection with shutdown • Thermal shutdown with hysteresis
Package
Internal Feedback Compensation
Gate Driver (Source/Sink) [Ω]
TJ Op. Range [°C]
V DD Range [V]
IC Supply Current [mA]
Peak Current Spreading
Frequency Spreading
Max fsw [kHz]
Part
*Control Method
Energy Control | D i g i ta l P F C C o n t r o l l e r s
CS1501
*VF-DCM
70
1.5
7.9 – 17.0
-40 to +125
9/6
SOIC-8
CS1601
*VF-DCM
70
1.5
7.9 – 17.0
-40 to +125
9/6
SOIC-8
CS1601H
*VF-DCM
100
1.7
7.9 – 17.0
-40 to +125
9/6
SOIC-8
Efficiency Performance
evaluation boards
98.00
96.00
Efficiency (%)
94.00
Cirrus Logic has a sizable advantage in efficiency
C DB150X-01 Demonstration Board
92.00
Demonstrates the performance of the CS1501 digital PFC This board is 97% efficient at full load. Suited for power supply applications with 90-265Vac input.
Leading Analog CRM (380 uH)
88.00
86.00
controller with a 90 watt output at a link voltage of 400 volts.
Cirrus CS1601 (380 uH)
90.00
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Power (W) At 277 Vac input, EFF plot across load range
THD Performance
22
C DB1601-120W Demonstration Board
THD <10% preferred for ballasts 17
Demonstrates the performance of the CS1601 digital PFC
Leading Analog CRM (680 uH)
controller with a 120 watt output at a link voltage of 460 volts. This board is 95% efficient at full load. Suited for lighting
THD (%)
CS1601 (380 uH)
applications with 108-305Vac input. 12
6%
7
2% 2
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Power (W) At 120 Vac input, THD plot across load range
C RD1601-120W Reference Design Board
Demonstrates the performance of the CS1601 digital PFC EXL CORE TECHNOLOGY
controller in an electronic ballast application. The CRD1601 uses
The EXL Core is a digital technology platform at the heart of Cirrus
a resonant second stage driver to power up to two T5
Logic’s commitment to develop innovative solutions that help our
fluorescent lamps. The CRD1601 has been designed to fit into a
customers cost effectively create smarter, greener energy products.
slimline T5 fluorescent electronic ballast form factor.
