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CS5121-L, CS5122, CS51220

Table of contents:
Info of CS5121-L
Info of CS5122
Info of CS51220

CS5121-L, CS5122, CS51220 Selling Leads, Datasheet

MFG:CRYSTAL Package Cooled:50 D/C:300

CS5121-L, CS5122, CS51220 Datasheet download

Five Points

Part Number: CS5121-L

MFG: CRYSTAL

Package Cooled: 50

D/C: 300

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CS51220 General Description

CS51220 is a single output PWM Controller with switching frequency up to 500 kHz. The feed forward voltage mode control provides excellent line regulation for wide input range. This PWM controller has a synchronization output allowing programmable phase delay. For overcurrent protection, the "soft hiccup" technique effectively limits the output current with maximum flexibility. In addition, this device includes such features as: soft start,pulsebypulse current limit, programmable foldback current limit, voltsecond clamping, maximum duty cycle, overvoltage and undervoltage protection, and synchronization input. The CS51220 is available in 16 SO narrow surface mount package.

CS51220 Maximum Ratings

Rating	Value	Unit
Operating Junction Temperature, T_J	150	°C
Storage Temperature Range, T_S	65 to +150	°C
ESD Susceptibility (Human Body Model)	2.0	KV
Thermal Resistance, JunctiontoCase, R_JC	28	°C/W
Thermal Resistance, JunctiontoAmbient, R_JA	115	°C/W
Lead Temperature Soldering:Reflow:(SMD styles only)(Note1)	230 peak	°C

1. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed.

CS51220 Features

• Constant Frequency Feed Forward Voltage Mode Control
• Programmable Pulse by Pulse Overcurrent Limit
• Programmable Foldback Overcurrent Limit with Delay
• Soft Hiccup Overcurrent Protection with Programmable Foldback
• Frequency Synchronization Output with Programmable Phase Delay
• Synchronization Input to Higher or Lower Frequency
• Direct Connection to External Opto Isolators
• Logic Gate Output Signal
• Accurate VoltSecond Clamping
• Programmable Soft Start
• Logic Input to Disable IC
• Line Overvoltage and Undervoltage Monitoring
• 3.3 V 3% Reference Voltage Output

CS51220 Connection Diagram

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