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NT3875A डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - Wide Input Range CC/CV Step Down Converter - Noveltek

भाग संख्या NT3875A
समारोह Wide Input Range CC/CV Step Down Converter
मैन्युफैक्चरर्स Noveltek 
लोगो Noveltek लोगो 
पूर्व दर्शन
1 Page
		
<?=NT3875A?> डेटा पत्रक पीडीएफ

NT3875A pdf
Conceptual
NT3875A/B
Typical Application Circuit
VIN BST
VCC
LX
COMP/EN
ISEN+
R3 ISEN-
GND
FB
RS VOUT
0R 0R
R1
R2
Functional Pin Description
No. Pin Name Pin Function
1
VCC
Power Supply Input. Bypass this pin with a 10uF ceramic capacitor to GND, placed as close
to the IC as possible.
Feedback Pin. The voltage at this pin is regulated to 1.2V. Connect to the resistor divider
2 FB between output and GND to set the output voltage.
Error Amplifier Output. This is the output of the error amplifier (EA) and the non-inverting input
3
COMP/EN
of the PWM comparator. Use this pin in combination with the VSEN pin to compensate the voltage
control feedback loop of the converter. Pulling COMP/EN to a level below 0.4V nominal disables
the controller, causes the oscillator to stop, and makes the UGATE and LGATE outputs held low.
Ground. Connect this pin to a large PCB copper area for best heat dissipation, Return VSEN,
4 GND and COMP to this GND and connect this GND to power GND at a single point for best noise
immunity.
5 ISEN+ The Current Sense Input (+) Pin.
6 ISEN- The Current Sense Input (-) Pin.
7
BST
Bootstrap Pin. This provides power to the internal higher MOSFET gate driver. Connect a 10nF
capacitor from BST pin to LX pin.
8X L
Power Switching Output to External Inductor.
Noveltek Semiconductor Corp., http://www.noveltek-semi.com
Rev. C30, FileName: NT3875-DS-C3000
2

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