Specification	CS51221EDR16G

Clock Sync	True
Control Features	Frequency Control, Soft Start, Current Limit, Ramp
Frequency - Switching	1 MHz
Function	Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive, Isolation Capable
Output Phases	1
Output Type	Transistor Driver
Package / Case	16-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Supplier Device Package	16-SOIC
Synchronous Rectifier	False
Topology	Forward Converter

CS51221 Series

Part	Output Configuration	Supplier Device Package	Output Type	Frequency - Switching	Control Features	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Number of Outputs	Function	Mounting Type	Package / Case [x]	Package / Case	Package / Case [y]	Output Phases
ON Semiconductor CS51221EDTB16G	Isolation Capable Positive	16-TSSOP	Transistor Driver	1 MHz	Current Limit Frequency Control Ramp Soft Start	85 °C	-40 °C	Forward Converter	1	Step-Up/Step-Down	Surface Mount	0.173 in	16-TSSOP	4.4 mm	1
ON Semiconductor CS51221ED16G	Isolation Capable Positive	16-SOIC	Transistor Driver	1 MHz	Current Limit Frequency Control Ramp Soft Start	85 °C	-40 °C	Forward Converter	1	Step-Up/Step-Down	Surface Mount	0.154 in	16-SOIC	3.9 mm	1
ON Semiconductor CS51221EDR16G	Isolation Capable Positive	16-SOIC	Transistor Driver	1 MHz	Current Limit Frequency Control Ramp Soft Start	85 °C	-40 °C	Forward Converter	1	Step-Up/Step-Down	Surface Mount	0.154 in	16-SOIC	3.9 mm	1
ON Semiconductor CS51221ED16	Isolation Capable Positive	16-SOIC	Transistor Driver	1 MHz	Current Limit Frequency Control Ramp Soft Start	85 °C	-40 °C	Forward Converter	1	Step-Up/Step-Down	Surface Mount	0.154 in	16-SOIC	3.9 mm	1

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Description

General part information

CS51221 Series

The CS51221 Enhanced Voltage Mode PWM Controller contains all of the features necessary for basic voltage mode operation. This PWM controller has been optimized for high frequency primary side control operation. In addition, this device includes such features as: Soft Start, accurate duty cycle limit control, less than 50uA startup current, over and under voltage protection and bidirectional synchronization. The CS51221 is available in a SOIC-16 and TSSOP-16 surface mount packages.