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NCP1256 Datasheet(PDF) 3 Page - ON Semiconductor |
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NCP1256 Datasheet(HTML) 3 Page - ON Semiconductor |
3 / 24 page NCP1256 www.onsemi.com 3 1 2 3 6 4 5 NCP1256 Vbulk . . OPP adjust Vout Figure 3. Typical Application Example – OVP is Latched on Vcc, OTP Latched on CS Table 1. PIN DESCRIPTIONS Pin No Pin Name Function Pin Description 1 GND − The controller ground. 2 FB Feedback pin Hooking an optocoupler collector to this pin will allow regulation. 3 BO/OVP Adjust the BO level Latch input A voltage below the programmed level stops the controller. When above, the controller can start. When the pin is brought above 4.5 V for four consecutive clock cycles, the part latches off. With the E version, an auto−recovery ac line OVP is available through this pin. 4 CS Current sense + OPP adjustment Latch input This pin monitors the primary peak current but also offers a means to introduce over power compensation. When the pin is brought above 1.5 V during the off time, the part permanently latches off. 5 Vcc Supplies the controller – protects the IC This pin is connected to an external auxiliary voltage. An OVP comparator monitors this pin and offers a means to latch the con- verter in fault conditions. 6 DRV Driver output The driver’s output to an external MOSFET gate. Table 2. OPTIONS Controller Frequency OCP OVP on BO OVP/OTP CS OVP Vcc NCP1256ASN65T1G 65 kHz Latched Latched Latched Latched NCP1256BSN65T1G 65 kHz Auto−recovery Latched Latched Latched NCP1256ASN100T1G 100 kHz Latched Latched Latched Latched NCP1256BSN100T1G 100 kHz Auto−recovery Latched Latched Latched NCP1256ESN65T1G 65 kHz Auto−recovery Auto−recovery Auto−recovery Auto−recovery |
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Similar Description - NCP1256 |
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