NCP1256ASN65T1G
  • Share:

onsemi NCP1256ASN65T1G

Manufacturer No:
NCP1256ASN65T1G
Manufacturer:
onsemi
Package:
Tape & Reel (TR)
Description:
IC OFFLINE SWITCH FLYBACK 6TSOP
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The NCP1256ASN65T1G, produced by onsemi, is a low-power offline PWM current mode controller designed for building cost-effective switch-mode power supplies. This component is housed in a compact TSOP-6 package and can be supplied up to 30 V. It operates at a fixed frequency of 65 kHz and features a peak current mode control with internal slope compensation. The NCP1256ASN65T1G includes several protection features such as timer-based auto-recovery short circuit protection, lossless Over Power Protection (OPP), and an easily adjustable Brown Out (BO) level. It is particularly suited for applications requiring low part-count and cost-effectiveness, such as ac-dc adapters and auxiliary power supplies.

Key Specifications

Symbol Rating Min Max Unit Pin
VCCON VCC increasing level at which driving pulses are authorized 16 18 20 V 5
VCC(min) VCC decreasing level at which driving pulses are stopped 8.3 8.9 9.5 V 5
VCCHYST Hysteresis VccON−Vcc(min) 8.4 - 9.25 V 5
ICC1 Start-up current 5 7.5 - μA 5
fOSC,nom Oscillation Frequency 61 65 70 kHz -
Dmax Maximum duty ratio 77 80 83 % -
fjitter Frequency jittering in percentage of fOSC - - ±5 % -

Key Features

  • Fixed-frequency 65 kHz current-mode control operation
  • Adjustable Over Power Protection (OPP) circuit, disabled at low line
  • Adjustable Brown Out level
  • Frequency foldback down to 26 kHz and skip-cycle in light load conditions
  • Internally-fixed slope compensation ramp
  • Internally-fixed 4 ms soft-start
  • 70 ms timer-based auto-recovery short-circuit protection
  • Frequency jittering in normal and frequency foldback modes
  • Double hiccup auto-recovery short-circuit protection
  • Pre-short ready for latched OCP option
  • Latched/auto-recovery OVP protection on Vcc
  • Latched inputs for improved robustness (OVP and OTP implementations)
  • +500 mA/ −500 mA source/sink drive capability
  • EPS 2.0 compliant and Pb-free device

Applications

  • Ac-dc adapters for portable devices, computers, tablets, etc.
  • Auxiliary power supplies
  • Low-cost ac-dc adapters and open-frame power supplies

Q & A

  1. What is the operating frequency of the NCP1256ASN65T1G?

    The NCP1256ASN65T1G operates at a fixed frequency of 65 kHz.

  2. What type of protection does the NCP1256ASN65T1G offer against short circuits?

    The NCP1256ASN65T1G offers 70 ms timer-based auto-recovery short-circuit protection and double hiccup auto-recovery short-circuit protection.

  3. How does the frequency foldback feature work in the NCP1256ASN65T1G?

    The controller reduces the switching frequency down to 26 kHz as the feedback pin voltage decreases, and enters skip-cycle mode when the feedback pin voltage drops further.

  4. What is the purpose of the Brown Out (BO) pin in the NCP1256ASN65T1G?

    The BO pin allows for the adjustment of the Brown Out level and can latch off the controller if the voltage drops below a programmed level.

  5. Does the NCP1256ASN65T1G have any EMI mitigation features?

    Yes, the NCP1256ASN65T1G includes frequency jittering to improve the EMI signature, especially in light load conditions.

  6. What is the soft-start duration of the NCP1256ASN65T1G?

    The soft-start duration is internally fixed at 4 ms.

  7. Is the NCP1256ASN65T1G compliant with any specific standards?

    Yes, it is EPS 2.0 compliant and is a Pb-free device.

  8. What is the maximum duty ratio of the NCP1256ASN65T1G?

    The maximum duty ratio is up to 83%.

  9. How does the Over Power Protection (OPP) work in the NCP1256ASN65T1G?

    The OPP is adjustable and can be disabled at low line conditions. It also includes a non-dissipative OPP circuit.

  10. What are the typical applications for the NCP1256ASN65T1G?

    Typical applications include ac-dc adapters for portable devices, computers, tablets, and auxiliary power supplies.

Product Attributes

Output Isolation:Isolated
Internal Switch(s):No
Voltage - Breakdown:- 
Topology:Flyback
Voltage - Start Up:18 V
Voltage - Supply (Vcc/Vdd):8.9V ~ 28V
Duty Cycle:80%
Frequency - Switching:65kHz
Power (Watts):- 
Fault Protection:Over Power, Over Voltage, Short Circuit
Control Features:- 
Operating Temperature:-40°C ~ 125°C (TJ)
Package / Case:SOT-23-6 Thin, TSOT-23-6
Supplier Device Package:6-TSOP
Mounting Type:Surface Mount
0 Remaining View Similar

In Stock

$0.25
3,650

Please send RFQ , we will respond immediately.

Same Series
NCP1256ASN100T1G
NCP1256ASN100T1G
IC OFFLINE SWITCH FLYBACK 6TSOP
NCP1256ASN65T1G
NCP1256ASN65T1G
IC OFFLINE SWITCH FLYBACK 6TSOP
NCP1256ESN65T1G
NCP1256ESN65T1G
IC OFFLINE SWITCH FLYBACK 6TSOP
NCP1256BSN100T1G
NCP1256BSN100T1G
IC OFFLINE SWITCH FLYBACK 6TSOP

Similar Products

Part Number NCP1256ASN65T1G NCP1256BSN65T1G NCP1256ESN65T1G NCP1250ASN65T1G NCP1251ASN65T1G NCP1253ASN65T1G NCP1254ASN65T1G
Manufacturer onsemi onsemi onsemi onsemi onsemi onsemi onsemi
Product Status Active Active Active Obsolete Last Time Buy Obsolete Obsolete
Output Isolation Isolated Isolated Isolated Isolated Isolated Isolated Isolated
Internal Switch(s) No No No No No No No
Voltage - Breakdown - - - - - - -
Topology Flyback Flyback Flyback Flyback Flyback Flyback Flyback
Voltage - Start Up 18 V 18 V 18 V 18 V 18 V 18 V 18 V
Voltage - Supply (Vcc/Vdd) 8.9V ~ 28V 8.9V ~ 28V 8.9V ~ 28V 8.8V ~ 28V 8.8V ~ 28V 8.8V ~ 28V 8.8V ~ 35V
Duty Cycle 80% 80% 80% 80% 80% 80% 80%
Frequency - Switching 65kHz 65kHz 65kHz 65kHz 65kHz 65kHz 65kHz
Power (Watts) - - - - - - -
Fault Protection Over Power, Over Voltage, Short Circuit Over Power, Over Voltage, Short Circuit Over Power, Over Voltage, Short Circuit Over Power, Over Voltage, Short Circuit Over Power, Over Voltage, Short Circuit Over Voltage, Short Circuit Over Load, Over Power, Over Voltage, Short Circuit
Control Features - - - - - - -
Operating Temperature -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ)
Package / Case SOT-23-6 Thin, TSOT-23-6 SOT-23-6 Thin, TSOT-23-6 SOT-23-6 Thin, TSOT-23-6 SOT-23-6 Thin, TSOT-23-6 SOT-23-6 Thin, TSOT-23-6 SOT-23-6 Thin, TSOT-23-6 SOT-23-6 Thin, TSOT-23-6
Supplier Device Package 6-TSOP 6-TSOP 6-TSOP 6-TSOP 6-TSOP 6-TSOP 6-TSOP
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount

Related Product By Categories

TEA1751LT/N1,518
TEA1751LT/N1,518
NXP USA Inc.
IC OFFLINE SWITCH FLYBACK 16SO
NCP1377D1R2G
NCP1377D1R2G
onsemi
IC OFFLINE SWITCH FLYBACK 7SOIC
MC33364DR2G
MC33364DR2G
onsemi
IC OFFLINE SWITCH FLYBACK 16SOIC
VIPER267KDTR
VIPER267KDTR
STMicroelectronics
IC OFFLINE SWITCH MULT TOP 16SO
VIPER22ADIP-E
VIPER22ADIP-E
STMicroelectronics
IC OFFLINE SWITCH FLYBACK 8DIP
NCP1251BSN100T1G
NCP1251BSN100T1G
onsemi
IC OFFLINE SWITCH FLYBACK 6TSOP
NCP1399AADR2G
NCP1399AADR2G
onsemi
IC OFFLINE SW HALF-BRDG 16SOIC
NCP1377BP
NCP1377BP
onsemi
IC OFFLINE SWITCH FLYBACK 7DIP
VIPER100A-22-E
VIPER100A-22-E
STMicroelectronics
IC OFFLIN CONV FLBACK 5PENTAWATT
UC2825BDWG4
UC2825BDWG4
Texas Instruments
IC OFFLINE SW MULT TOP 16SOIC
NCP1280DR2G
NCP1280DR2G
onsemi
IC OFFLINE SW MULT TOP 16SOIC
FAN604HMX
FAN604HMX
onsemi
IC OFFLINE SWITCH FLYBACK 10SOIC

Related Product By Brand

MR2835SKG
MR2835SKG
onsemi
TVS DIODE 23VWM TOP CAN
SBAS16WT1G
SBAS16WT1G
onsemi
DIODE GEN PURP 75V 200MA SC70
MMBZ5244BLT1G
MMBZ5244BLT1G
onsemi
DIODE ZENER 14V 225MW SOT23-3
SMUN5311DW1T3G
SMUN5311DW1T3G
onsemi
TRANS NPN/PNP PREBIAS SOT363
BD138G
BD138G
onsemi
TRANS PNP 60V 1.5A TO126
NSS60600MZ4T3G
NSS60600MZ4T3G
onsemi
TRANS PNP 60V 6A SOT223
FGHL75T65MQD
FGHL75T65MQD
onsemi
IGBT 650V 75A TO247
NCV2904VDR2G
NCV2904VDR2G
onsemi
IC OPAMP GP 2 CIRCUIT 8SOIC
MC74HC00ADG
MC74HC00ADG
onsemi
IC GATE NAND 4CH 2-INP 14SOIC
MC74AC139DR2G
MC74AC139DR2G
onsemi
IC DECODER/DEMUX 1X2:4 16SOIC
NCP1377DR2G
NCP1377DR2G
onsemi
IC OFFLINE SWITCH FLYBACK 8SOIC
LM317MDTG
LM317MDTG
onsemi
IC REG LINEAR POS ADJ 500MA DPAK