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Numéro de référence | UC3843 | ||
Description | Fixed Frequency Current Mode PWM Controller | ||
Fabricant | ChipsWinner | ||
Logo | |||
1 Page
UC3843
Fixed Frequency Current Mode PWM Controller
DESCRIPTION
UC3843 is a fixed frequency current-mode PWM controller.
It is specially designed for Off Line and DC-to-DC converter
applications with minimal external component. This
integrated circuit features a trimmed oscillator for precise
duty cycle control, a temperature compensated reference, a
high gain error amplifier, a current sensing comparator, and
a high current totem pole output ideally suited for driving a
power MOSFET.
The device is protective features consisting of input and
reference under-voltage lockouts each with hysteresis,
cycle-by-cycle current limiting.
PIN CONFIGURATION
Compensation
Voltage Feedback
Current Sense
RT/CT
1
2
3
4
8 Vref
7 VCC
6 Output
5 GND
(Top View)
FEATURES
● Automatic Feed Forward Compensation
● High Current Totem Pole Output
● Internally Trimmed Bandgap Reference
● Undervoltage Lockout with Hysteresis
● Low Start Up Current
● Optimized for offline converter
● Double pulse suppression
● Current mode operation to 500kHz
APPLICATION
● Wireless Base Station Power
● Telecom and Datacom Power
● Industrial Power Systems
● PC Power Supplies
ORDERING INFORMATION
Temperature Range
0°C to +70°C
Package
DIP8L
SOP8L
Pb-Free
Orderable
Device
UC3843D
UC3843P
Package Qty
75Units/Tube
50Units/Tube
Jun. 2008
Rev 1.0
1
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Pages | Pages 11 | ||
Télécharger | [ UC3843 ] |
No | Description détaillée | Fabricant |
UC3840 | PWM CONTROLLER | STMicroelectronics |
UC3841 | Programmable Off-Line PWM Controller | Texas Instruments |
UC3842 | Current Mode PWM Controller (Rev. C) | Texas Instruments |
UC3842 | Current-mode PWM controller | Philips |
US18650VTC5A | Lithium-Ion Battery | Sony |
TSPC106 | PCI Bus Bridge Memory Controller | ATMEL |
TP9380 | NPN SILICON RF POWER TRANSISTOR | Advanced Semiconductor |
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