Microchip SG3845M

Manufacturer No:

SG3845M

Manufacturer:

Microchip

Package:

8-DIP (0.300, 7.62mm)

Description:

Current Mode PWMs Isolated Switching Reg Low Start-Up Current (\u0026lt;1mA) 0\u0026#176;C to70\u0026#176;C

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SG3845M information

Microchip SG3845M technical specifications, attributes, parameters and parts with similar specifications to Microchip SG3845M.

Type
Parameter

Regulator Type
HI Rel Switching Regulators

Configuration
Current Mode PWMs

Supported Topology
Power MOSFET Driver

Supported Output
1

Minimum Input Voltage (V)
30

Maximum Input Voltage (V)
30

Output Current (mA) Max
1000

Maximum Frequency (kHz)
500

Operating Temperature Range (°C)
0 to 70

Vref (V)
5

Duty Cycle Min (%)
0

Duty Cycle Max (%)
48

UVLO
Yes

Current Limit
Yes

Output Current
0

Quiescent Current (mA) typ
0

Switch current (A) typ
0

SHUTDOWN Current (µA) (Typ)
0

# of Outputs
0

Vfb V (volt)
0

Download datasheets and manufacturer documentation for Microchip SG3845M.

The SG1844/45 family of control ICs provides all the required features to implement off-line Fixed Frequency, Current-mode switching power supplies with a minimum number of external components. Current-mode architecture demonstrates improved line regulation, improved load regulation, pulse-by pulse current limiting and inherent protection of the power supply output switch.
The Bandgap reference is trimmed to ±1% over temperature. Oscillator discharge current is trimmed to less than ±10%. The SG1844/45 has under-voltage lockout, current-limiting circuitry and start-up current of less than 1mA. The totem-pole output is optimized to drive the gate of a power MOSFET. The output is low in the off state to provide direct interface to an Nchannel device. Both operate up to a maximum duty cycle range of zero to <50% due to an internal toggle flip-flop which blanks the output off every other clock cycle. The SG1844/45 is specified for operation over the full military ambient temperature range of -55°C to 125°C. The SG3844/45 is designed for the commercial range of 0°C to 70°C.

Optimized For Off-Line Control
Low Start-Up Current (<1mA)
Automatic Feed Forward Compensation
Trimmed Oscillator Discharge Current
Pulse-By-Pulse Current Limiting
Enhanced Load Response Characteristics -Undervoltage Lockout with 6V Hysteresis
Double-Pulse Suppression
High-Current Totem-Pole Output (1A Peak)
Internally Trimmed Band-gap Reference
500kHz Operation SG1845 - 8.4 Volts
Low Shoot-Through Current <75mA Over Temperature

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