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TOP254PN Datasheet(PDF) 16 Page - Power Integrations, Inc. |
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TOP254PN Datasheet(HTML) 16 Page - Power Integrations, Inc. |
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16 / 48 page 
Rev. F 01/09 16 TOP252-262 www.powerint.com Typical Uses of VOLTAGE MONITOR (V) and EXTERNAL CURRENT LIMIT (X) Pins XF PI-4716-020508 DC Input Voltage + - D CS D S C CONTROL V VX C S F D D SC DC X V SS SS S TOP254-258Y TOP252-258M PI-4717-120307 DC Input Voltage + - D S C CONTROL V 4 M R LS V UV = IUV × RLS +VV (IV = IUV) V OV =IOV ×RLS +VV (IV = IOV) For R LS = 4 M V UV = 102.8 VDC V OV = 451 VDC DC MAX@100 VDC = 76% DC MAX@375 VDC = 41% PI-4756-121007 DC Input Voltage Sense Output Voltage + - DV S C V UV = IUV × RLS +VV (IV = IUV) V OV =IOV ×RLS +VV (IV = IOV) For R LS = 4 M V UV = 102.8 VDC V OV = 451 VDC DC MAX @ 100 VDC = 76% DC MAX @ 375 VDC = 41% CONTROL R LS 4 M 10 k Reset Q R PI-4719-120307 DC Input Voltage Sense Output Voltage + - DV S C V UV = IUV × RLS +VV (IV = IUV) V OV =IOV ×RLS +VV (IV = IOV) For R LS = 4 M V UV = 102.8 VDC V OV = 451 VDC DC MAX @ 100 VDC = 76% DC MAX @ 375 VDC = 41% CONTROL R LS 4 M R OVP >3k VR OVP ROVP Figure 16a. Three Terminal Operation (VOLTAGE MONITOR and EXTERNAL CURRENT LIMIT Features Disabled. FREQUENCY Pin Tied to SOURCE or CONTROL Pin) for TOP254-258 Y Packages. Figure 17. Line-Sensing for Undervoltage, Overvoltage and Line Feed-Forward. Figure 18. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and Latched Output Overvoltage Protection. Figure 19. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and Hysteretic Output Overvoltage Protection. Figure 16c. Three Terminal Operation (VOLTAGE MONITOR and EXTERNAL CURRENT LIMIT Features Disabled. FREQUENCY Pin Tied to SOURCE or CONTROL Pin) for TOP252-262 L and E Packages. XG PI-4984-020708 DC Input Voltage + - D CS D S C CONTROL V TOP259-261Y VX C S G D Figure 16b. Three Terminal Operation (VOLTAGE MONITOR and EXTERNAL CURRENT LIMIT Features Disabled for TOP259-261 Y Packages. XF DC Input Voltage + - D CS D S C CONTROL V VX C S FD CS D PI-4956-071708 eSIP E Package VX C S FD eSIP L Package |
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