DatasheetsPDF.com

NCP81253 Datasheet PDF


Part Number NCP81253
Manufacturer ON Semiconductor
Title 5V MOSFET Driver Compatible
Description Pin No. Pin Name Description 1 BST Floating bootstrap supply pin for the high−side gate driver. Connect the external bootstrap capacitor betwe...
Features
• Space−efficient 2 mm x 2 mm DFN8 Thermally−enhanced Package
• VCC Range of 4.5 V to 5.5 V
• Internal Bootstrap Diode
• 5 V 3−stage PWM Input
• Diode Braking Capability via EN Mid−state
• Adaptive Anti−cross Conduction Circuit Protects against Cross−conduction during FET Turn−on and Turn−off
• Outp...

File Size 85.26KB
Datasheet NCP81253 PDF File








Similar Ai Datasheet

NCP81038 : Pin No. Symbol Description 1, 21 GH1, GH2 Gate driver output of the top N−channel MOSFET. 2, 20 BST1, BST2 Top gate driver input supply, a bootstrap capacitor connection between SWNx and this pin. 3, 19 SWN1, SWN2 Switch node between the top MOSFET and bottom MOSFET. 4 GL2 Gate driver output of bottom N−channel MOSFET in channel2. 18 GL1/FSET Gate driver output of bottom N−channel MOSFET in channel1. And it is also used to set up switching frequency by connecting a resistor from this pin to ground. 5, 17 PGND1, PGND2 Power ground for channel 1 & 2. 6, 16 CSP1, CSP2 Inductor current differential sense non−inverting input. 7, 15 CSN1, CSN2 Inductor current differential.

NCP81039 : Pin No. Symbol Description 1 EN Logic control for enabling the switcher. Applying greater than 1.4 V will turn on the part. Connect to GND to disable. 2 VCC Supply for analog circuit. 3 VID1 Logic input for reference voltage selector. Use in conjunction with the VID0 pin to select among four set−point reference voltages. 4 VID0 Logic input for reference voltage selector. Use in conjunction with the VID1 pin to select among four set−point reference voltages. 5 V3 Voltage set−point programming resistor input. 6 V2 Voltage set−point programming resistor input. 7 V1 Voltage set−point programming resistor input. External reference input when enabled by connecting the V3 pin to t.

NCP81040 : Pin No 1 Mnemonic VCC3 Description 3.3 V Power Supply Output. A capacitor from this pin to ground provided decoupling for the interval 3.3 V LDO. 2 ALERT ALERT Output. Open drain output that asserts low when the VR exceeds a programmable limit. 3 FAULT FAULT Output. Open drain output that asserts low when a fault has occurred. The fault can be due to VR or current limit, crowbar, or undervoltage. The trip points are loaded into registers. 4 SDA Digital Input/Output. I2C serial data bidirectional pin. Requires pullup. 5 SCL Digital Input. I2C serial bus clock open drain input. Requires pullup. 6 EN Power Supply Enable Input. Pulling this pin to GND disables the PWM outputs and.

NCP81042 : Pin No. Symbol 1 VCCP 2 LG 3 LX 4 BOOT 5 UG 6 PGOOD 7 SYNC 8 COMP 9 FB 10 VSEN 11 FBG 12 CSN/VO 13 CSP 14 ROSC/EN 15 VCC 16 GND THERMAL PAD Description Power supply for bottom gate MOSFET drivers Bottom gate MOSFET driver pin Switch node Supply rail for the floating top gate driver Top gate MOSFET driver pin Power Good. It is an open−drain output, set free after SS (with 3x clock delay) as long as the output voltage monitored through VSEN is within specifications. Synchronization Pin. The controller synchronizes on the falling edge of a square wave provided to this pin. Short to GND if not used. Output of the error amplifier Inverting input to the error a.

NCP81044 : Pin No. 1 Symbol BST Description Supply rail for the floating top gate driver. To form a boost circuit, use an external diode to bring the desired input voltage to this pin (cathode connected to BST pin). Connect a capacitor (CBST) between this pin and the PHASE pin. Typical values for CBST range from 0.1 mF to 1 mF. Ensure that CBST is placed near the IC. Top gate MOSFET driver pin. Connect this pin to the gate of the top N−Channel MOSFET. IC ground reference. All control circuits are referenced to this pin. Bottom gate MOSFET driver pin. Connect this pin to the gate of the bottom N−Channel MOSFET. Supply rail for the internal circuitry. Operating supply range is 4.5 V to 13.2 V. Decouple w.

NCP81045 : Pin No. Symbol Description 1 VIN Input voltage used for feed forward in switcher operation. 2 VCC Supply for analog circuit 3 SYN Synchronization interleaving use. 4 EN This pin serves as two functions. Enable: Logic control for enabling the switcher. MASTER/SLAVE: To program the device as MASTER or SLAVE mode at dual device operation. 5 COMP Output of the error amplifier. 6 FB Output voltage feed back. 7 IDRP/OCP Current limit programmable and setting for AVP. 8 CS−/Vo Inductor current differential sense inverting input. 9 CS+ Inductor current differential sense non−inverting input. 10 PGND Ground reference and high−current return path for the bottom gate driver. 1.

NCP81046 : Pin No. Symbol Description 1 BOOT Supply rail for the floating top gate driver. To form a boost circuit, use an external diode to bring the desired input voltage to this pin (cathode connected to BOOT pin). Connect a capacitor (CBOOT) between this pin and the LX pin. Typical values for CBOOT range from 0.1 mF to 1 mF. Ensure that CBOOT is placed near the IC. 2 LX Switch node pin. This is the reference for the floating top gate driver. Connect this pin to the source of the top MOSFET. 3 UG Top gate MOSFET driver pin. Connect this pin to the gate of the top N−channel MOSFET. 4 LG Bottom gate MOSFET driver pin. Connect this pin to the gate of the bottom N−channel MOSFET. 5 GND.

NCP81062 : Pin No. Symbol 1 BST 2 PWM 3 EN 4 VCC 5 DRVL 6 GND 7 SW 8 DRVH 9 FLAG Description Floating bootstrap supply pin for high side gate driver. Connect the bootstrap capacitor between this pin and the SW pin. Control input. The PWM signal has three distinctive states: Low = Low Side FET Enabled, Mid = Diode Emulation Enabled, High = High Side FET Enabled. Logic input. A logic high to enable the part and a logic low to disable the part. Power supply input. Connect a bypass capacitor (0.1 mF) from this pin to ground. Low side gate drive output. Connect to the gate of low side MOSFET. Bias and reference ground. All signals are referenced to this node (QFN Flag). Switch node. Connect this pin .

NCP81063 : Pin No. Symbol 1 BST 2 PWM 3 EN 4 VCC 5 DRVL 6 GND 7 SW 8 DRVH 9 FLAG Description Floating bootstrap supply pin for high side gate driver. Connect the bootstrap capacitor between this pin and the SW pin. Control input: PWM = High → DRVH is high, DRVL is low. PWM = Mid → Zero current detect enabled. Diode emulation mode. PWM = Low → DRVH is low, DRVL is high. 3−state input: EN = High → Driver is enabled. EN = Low → Driver is disabled. Power supply input. Connect a bypass capacitor (0.1 mF) from this pin to ground. Low side gate drive output. Connect to the gate of low side MOSFET. Bias and reference ground. All signals are referenced to this node (QFN Flag). Switch node. Connect this p.

NCP81071 : Pin No. Symbol Description 1 ENA Enable input for the driver channel A with logic compatible threshold and hysteresis. This pin is used to en- able and disable the driver output. It is internally pulled up to VDD with a 200 kW resistor for active high op- eration. The output of the pin when the device is disabled will be always low. 2 INA Input of driver channel A which has logic compatible threshold and hysteresis. If not used, this pin should be connected to either VDD or GND. It should not be left unconnected. 3 GND Common ground. This ground should be connected very closely to the source of the power MOSFET. 4 INB Input of driver channel B which has logic compatible thre.

NCP81074A : Pin No. Symbol 1 IN+ 2 GND 3 GND 4 OUTL 5 OUTH 6 VDD 7 VDD 8 IN− Description Non−Inverting Input which has logic compatible threshold and hysteresis. If not used, this pin should be connected to VDD. It should not be left unconnected. Common ground. This ground should be connected very closely to the source of the power MOSFET. Common ground. This ground should be connected very closely to the source of the power MOSFET. Sink pin. Connect to Gate of MOSFET. Source Pin. Connect to Gate of MOSFET. Power Supply Input Pin. Power supply Input Pin. Inverting Input which has logic compatible threshold and hysteresis. If not used, this pin should be connected to GND. It should not .

NCP81074B : Pin No. Symbol 1 IN+ 2 GND 3 GND 4 OUTL 5 OUTH 6 VDD 7 VDD 8 IN− Description Non−Inverting Input which has logic compatible threshold and hysteresis. If not used, this pin should be connected to VDD. It should not be left unconnected. Common ground. This ground should be connected very closely to the source of the power MOSFET. Common ground. This ground should be connected very closely to the source of the power MOSFET. Sink pin. Connect to Gate of MOSFET. Source Pin. Connect to Gate of MOSFET. Power Supply Input Pin. Power supply Input Pin. Inverting Input which has logic compatible threshold and hysteresis. If not used, this pin should be connected to GND. It should not .

NCP81075 : Pin No. SOIC/DFN8 Pin No. WDFN10 1 1 2 2 3 3 4 4 5 7 6 8 7 9 8 10 − 5,6 Symbol VDD HB HO HS HI LI VSS LO NC NCP81075 Description Positive Supply to the Lower Gate Driver High Side Bootstrap Supply High Side Output High−Side Source High−Side Input Low−Side Input Negative Supply Return Low−Side Output No Connect Table 2. MAXIMUM RATINGS Parameter Value Units VDD −0.3 to 24 V VHB VHO DC Repetitive Pulse 100 ns VHS DC VLO DC Repetitive pulse 100 ns −0.3 to 200 V VHS – 0.3 to VHB + 0.3 V VHS − 2 to VHB + 0.3, (VHB − VHS 24) −20 to 200 − VDD V −0.3 to VDD + 0.3 V −2 to VDD + 0.3 VHI, VLI VHB − HS Operating Junction Temperature Range, TJ Storag.

NCP81080 : TABLE Pin No. Symbol Description 1 VDD Positive supply for the low− side driver 2 HI High−Side Input 3 LI Low−Side Input 4 VSS Negative Supply Return 5 LO Low−Side Output 6 HS High−Side Source 7 HO High−Side Output 8 HB High−Side Bootstrap 9 EPAD Connect EPAD to VSS Table 2. MAXIMUM RATINGS Parameter VDD VHB – VSS VHO – VHS DC Repetitive Pulse 100 ns VHS − VSS VLO − VSS DC DC Repetitive pulse 100 ns VHI, VLI VHB − VHS IDiode AC (Peak current) Operating virtual Junction Temp Range, TJ Storage Temperature, TSTG Lead Temperature (Soldering, 10 sec) HBM CDM Table 3. RECOMMENDED OPERATING CONDITIONS Parameter VDD Supply Voltage Range VHS Volt.

NCP81081 : Pin No. 1 2 3, 8 4 5, 37, FLAG 41 6 7 9−14, FLAG 42 15, 29−35, FLAG 43 16−28 36 38 39 40 Pin Name ZCD_EN# VCIN NC BOOT CGND GH PHASE VIN VSWH PGND GL THWN DISB# PWM Enable Zero Current Detection Control Input Voltage No Connect Bootstrap Voltage Control Signal Ground High Side FET Gate Access Provides a return path for the high side driver of the internal IC. Place a high frequency ceramic capacitor of 0.1 uF to 1.0 uF from this pin to BOOT pin. Input Voltage Switch Node Output Power Ground Low Side FET Gate Access Thermal Warning Output Disable Pin PWM Drive Logic Description Table 2. ABSOLUTE MAXIMUM RATINGS Pin Symbol VCIN VIN BOOT Control Input Voltage Power Input Voltage Bootstrap Volt.

NCP81085 : Pin No. DFN9 Symbol 1 VDD 2 HB 3 HO 4 HS 5 NC 6 HI 7 LI 8 VSS 9 LO Description Positive Supply to the Lower Gate Driver High Side Bootstrap Supply High Side Output High−Side Source No Connect High−Side Input Low−Side Input Negative Supply Return Low Side Output Table 2. MAXIMUM RATINGS Parameter Value Units VDD −0.3 to 24 V VHB VHO DC Repetitive Pulse 100 ns VHS DC VLO DC Repetitive pulse 100 ns −0.3 to 200 V VHS – 0.3 to VHB + 0.3 V VHS − 2 to VHB + 0.3, (VHB − VHS 24) −20 to 200 − VDD V −0.3 to VDD + 0.3 V −2 to VDD + 0.3 VHI, VLI VHB − HS Operating Junction Temperature Range, TJ Storage Temperature, TSTG Lead Temperature (Soldering, 10.

NCP81105 : Pin No. Symbol Description 1 EN Logic input. Logic high enables the NCP81105 and logic low disables it. 2 VCC Power for the internal control circuits. A decoupling capacitor must be connected from this pin to ground. 3 VR_HOT# Open drain (logic level) output for over−temperature reporting. Low indicates high temp. 4 SDIO Bidirectional Serial VID data interface. 5 ALERT# Open drain Serial VID ALERT# output. 6 SCLK Serial VID clock input. 7 ROSC This pin outputs a constant current. A resistance from this pin to ground programs the switching fre- quency. 8 VR_RDY Open drain output. High indicates that the NCP81105 is regulating the output. 9 TSENSE Temperature sense .




Since 2006. D4U Semicon,
Electronic Components Datasheet Search Site. (Privacy Policy & Contact)