CS5124 Datasheet, PDF (1/11 Pages) Cherry Semiconductor Corporation – High Performance, Integrated Current Mode PWM Controllers

CS5124
High Performance,
Integrated Current Mode
PWM Controllers
The CS5124 is a fixed frequency current mode controller designed
specifically for DC−DC converters found in the telecommunications
industry. The CS5124 integrates many commonly required current
mode power supply features and allows the power supply designer to
realize substantial cost and board space savings.
The CS5124 integrates the following features: Internal Oscillator,
Slope Compensation, Sleep On/Off, Undervoltage Lock Out, Thermal
Shutdown, Soft−Start Timer, Low Voltage Current Sense for Resistive
Sensing, Second Current Threshold for Pulse−by−Pulse overcurrent
Protection, a Direct Optocoupler Interface and Leading Edge Current
Blanking.
The CS5124 has supply range of 7.7 V to 20 V and is available in 8
pin SOIC narrow package.
Features
• 400 kHz Oscillating Frequency
• Line UVLO Monitoring
• Low Current Sense Voltage for Resistive Current Sensing
• Bias for Startup Circuitry
• Thermal Shutdown
• Sleep On/Off Pin
• Soft−Start Timer
• Leading Edge Blanking
• Direct Optocoupler Interface
• 90 ns Propagation Delay
• 35 ns Driver Rise and Fall Times
• Sleep Mode
• Pb−Free Packages are Available
http://onsemi.com
8
1
SOIC−8
D SUFFIX
CASE 751
PIN CONNECTIONS AND
MARKING DIAGRAM
1
V_CC
BIAS
UVLO
SS
8
GND
GATE
I_SENSE
V_FB
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
ORDERING INFORMATION
Device
Package
Shipping^†
CS5124XD8
SOIC−8
95 Units/Rail
CS5124XD8G
SOIC−8
(Pb−Free)
95 Units/Rail
CS5124XDR8
SOIC−8 2500 Tape & Reel
CS5124XDR8G SOIC−8 2500 Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2009
1
July, 2009 − Rev. 7
Publication Order Number:
CS5124/D