CS1500-FSZ Cirrus Logic Inc, CS1500-FSZ Datasheet - Page 2

• Manufacturer Part Number: CS1500-FSZ
• Description: IC PFC CONTROLLER DCM 8SOIC
• Manufacturer: Cirrus Logic Inc
• Series: EXL Core™r

Specifications of CS1500-FSZ

• Package / Case: 8-SOIC (3.9mm Width)
• Mode: Discontinuous Conduction (DCM)
• Frequency - Switching: 66kHz
• Current - Startup: 68µA
• Voltage - Supply: 7.9 V ~ 17 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Switching Frequency: 70 KHz
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 598-1800

Power management
CS1500 uses a proprietary digital control algorithm
to shape conducted EMI emissions, resulting in
significantly reduced EMI filter requirements.
Digital EMI Noise Shaping consists of three major
components:
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eValUation moDUleS anD reFerenCe DeSignS
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©2010 Cirrus Logic, Inc. All rights reserved. Product information is subject to change without notice. Cirrus Logic, Cirrus, the Cirrus Logic logo designs, EXL Core, and the EXL Core
logo design are trademarks of Cirrus Logic, Inc. Other brand and product names may be trademarks or service marks of their respective owners.
CS1500
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Variable switching frequency
Digital Spread Spectrum
Peak current amplitude spreading
Digital noise shaping dramatically decreases
the size and cost of the EMI filter
Variable frequency DCM enables superior
efficiency under all load conditions
Low external component count
Comprehensive on-chip protection
CDB-CS1500- 100W PFC Only
CRD-CS1500-FB 75 W Notebook Adapter
Reference Design
CRD-CS1500-LLC 90 W Notebook Adapter
Reference Design
CRD-CS1500-LLC 250 W TV/PC Power
Reference Design
The average switching frequency is varied
with respect to the line voltage spreading
energy over a wide frequency band.
The switching frequency is highest at the peak of
the input voltage which minimizes peak currents
Shapes colored noise eliminating EMI noise spikes
Provides additional spreading and further
reduces EMI peaks.
Under Voltage Lockout
Over Voltage
Over Power
VF-DCM 70
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C S15 0 0 D i g i ta l P o w e r Fa C t o r C o r r e C t i o n
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Brownout
Open Loop
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1.9
7.9 – 17.0 -40 to +125
reFerenCe DeSign 90w CS1500 + FlybaCk
CS1500 Digital PFC + Flyback second stage
demonstrates the expected performance of Cirrus
Logic new digital energy controller. The combined
solution allows a simple one layer board and world
class efficiencies under all load conditions.
CS1500’s Digital EMI Noise Shaping enables
the simplification and reduction of EMI filter
components allowing for smaller more efficient
designs at any power level.
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75
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45
30
100
9 / 6
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SOIC-8
Conducted EMI Comparison
Frequency (kHz)
reFerenCe DeSign 90w CS1500 + llC
Demonstrating ultra high efficiency, the
CS1500+LLC reference design provides the best
efficiency and smallest EMI filter for power levels
up to 300 W. The Digital EMI Noise Shaping is
utilized to shape both PFC and 2nd differential
and common mode EMI noise. Efficiencies for this
design are ~90% with unmatched performance
under all load conditions with considerable power
dissipation advantages under light load and no
load conditions. This solution can be referenced
for the development of high end laptop adaptors,
PC Power, and low profile DTV Power.
reFerenCe DeSign 230w CS1500 + llC
This reference design demonstrates CS1500’s
unique ability to mitigate EMI noise, even at higher
rated power level. Typical power supply designs
for power levels > 200 W previously required more
expensive Continuous Conduction Mode (CCM)
technology, but with Cirrus Logic’s Digital EMI
Noise Shaping technology, cost effective
Discontinuous Conduction Mode (DCM) topologies
can scale up to 300 W. Cirrus Logic EXL Core
technology enables the optimization of switching
frequency and duty cycle, for all power levels, line
voltages, and load conditions, thus providing users
with the optimal energy controller for any PFC
enabled product.
For the full datasheet, visit
www.cirrus.com/support.
300
Product Bulletin 823106-0610-PB
CS1500 Digital PFC
Leading Analog PFC
EMI Limit
500