UC2845NG: Top Choice in United States (USA) Utsource Holding Company Limited

Description

Parameter	Symbol	Min	Typ	Max	Unit	Description
Supply Voltage	Vcc	12	16	30	V	Operating supply voltage range
Start Current	Ist	-	2.5	4.0	mA	Initial start current for the oscillator
Oscillator Frequency	fosc	70	100	150	kHz	Internal oscillator frequency
Duty Cycle Control	D	0.2	0.5	0.8	-	Adjustable duty cycle for PWM output
Maximum Duty Cycle	Dmax	-	0.9	0.95	-	Limit to prevent saturation of transformer
Reference Voltage	Vref	2.48	2.5	2.52	V	Internal reference voltage
Error Amplifier Gain	Aea	10	20	30	V/mV	Gain of the error amplifier
Compensation Pin Current	Ic	0.1	0.5	1.0	uA	Current into the compensation pin
Shutdown Current	Ishd	-	10	20	uA	Current consumption in shutdown mode
Operating Temperature	Topr	-40	25	125	°C	Operating temperature range
Storage Temperature	Tstg	-65	-	150	°C	Storage temperature range

Supply Voltage (Vcc): Ensure the supply voltage is within the specified range to avoid damage or improper operation.
Start Current (Ist): Set the start current according to the application requirements, ensuring it falls within the typical range for reliable startup.
Oscillator Frequency (fosc): Adjust the frequency as needed by modifying external components connected to the oscillator pins.
Duty Cycle Control (D): Use the duty cycle control feature to adjust the output waveform to match load requirements.
Maximum Duty Cycle (Dmax): Keep the duty cycle below the maximum limit to prevent transformer saturation and potential damage.
Reference Voltage (Vref): This internal reference is used for setting thresholds in feedback circuits; ensure stability around this value.
Error Amplifier Gain (Aea): Configure the gain to achieve desired response characteristics in the control loop.
Compensation Pin Current (Ic): Fine-tune the compensation network to stabilize the feedback loop.
Shutdown Current (Ishd): Utilize the shutdown feature to conserve power when the device is not in use.
Operating Temperature (Topr) & Storage Temperature (Tstg): Ensure environmental conditions do not exceed these limits to maintain reliability and longevity.

For detailed application-specific settings and configurations, refer to the manufacturer’s datasheet and application notes.

(For reference only)