Manufacturer Part #
UC3844BN
UC3844B Series 250 kHz High Performance Current Mode PWM Controller - DIP-8
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| Mfr. Name: | STMicroelectronics | ||||||||||
| Standard Pkg: | Product Variant Information section Available PackagingPackage Qty:50 per Tube | ||||||||||
| Date Code: | |||||||||||
Product Specification Section
STMicroelectronics UC3844BN - Product Specification
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ECCN:
EAR99
PCN Information:
N/A
File
Date
Part Status:
Active
Active
STMicroelectronics UC3844BN - Technical Attributes
Attributes Table
| Supply Current-Max: | 17mA |
| Supply Voltage: | 10V to 30V |
| Frequency-Max: | 250kHz |
| Input Voltage: | 2.58V |
| Topology: | Boost/Flyback |
| Rated Power: | 1.25W |
| Duty Cycle-Min: | 0% |
| Duty Cycle-Max: | 50% |
| Operating Temp Range: | -40°C to +150°C |
| Storage Temperature Range: | -65°C to +150°C |
| Output Current: | 1mA |
| Thermal Resistance: | 100°C/W |
Features & Applications
The UC3844BN is of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5 A.
A precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the offstate.
Features:
- Trimmed Oscillator for Precise frequency Control
- Oscillator Frequency Guaranteed at 250 Hz
- Current Mode Operation to 500 kHz
- Automatic Feed Forward Copensation
- Latching PWM for Cycle-by-cycle Current Limiting
- Internally Trimmed Reference with Undervoltage lockout
- High Current totem pole output Undervoltage Lockout With Hystersis
- Low Start-up and Operating Current
Pricing Section
Global Stock:
0
USA:
0
On Order:
0
Factory Lead Time:
14 Weeks
Quantity
Web Price
1
$0.485
75
$0.47
250
$0.45
750
$0.435
2,500+
$0.40
Product Variant Information section
Available Packaging
Package Qty:
50 per Tube
