 |
Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
|
Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
TC646BEPA Datasheet(PDF) 10 Page - Microchip Technology |
|
||||||||||||||||||||||||||||||
TC646BEPA Datasheet(HTML) 10 Page - Microchip Technology |
|
|
10 / 36 page  TC646B/TC648B/TC649B DS21755B-page 10 2003 Microchip Technology Inc. 3.0 PIN FUNCTIONS The descriptions of the pins are given in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE 3.1 Analog Input (VIN) The thermistor network (or other temperature sensor) connects to VIN. A voltage range of 1.20V to 2.60V (typ- ical) on this pin drives an active duty cycle of 0% to 100% on the VOUT pin. The TC646B, TC648B and TC649B devices enter shutdown mode when 0 ≤ VIN ≤ VSHDN. During shutdown, the FAULT/OTF output is inactive and supply current falls to 30 µA (typical). 3.2 Analog Output (CF) CF is the positive terminal for the PWM ramp generator timing capacitor. The recommended value for the CF capacitor is 1.0 µF for 30 Hz PWM operation. 3.3 Analog Input (VAS) An external resistor divider connected to VAS sets the auto-shutdown threshold. Auto-shutdown occurs when VIN < VAS. The fan is automatically restarted when VIN > (VAS + VHAS). During auto-shutdown, the FAULT/OTF output is inactive and supply current falls to 30 µA (typical). 3.4 Analog Input (SENSE) Pulses are detected at SENSE as fan rotation chops the current through a sense resistor. The absence of pulses indicates a fan fault condition. 3.5 Digital (Open-Drain) Output (FAULT/OTF) FAULT/OTF goes low to indicate a fault condition. When FAULT goes low due to a fan fault (TC646B and TC649B devices), the output will remain low until the fan fault condition has been removed (16 pulses have been detected at the SENSE pin in a 32/f period). For the TC646B and TC648B devices, the FAULT/OTF out- put will also be asserted when the VIN voltage reaches the VOTF threshold of 2.62V (typical). This gives an over-temperature/100% fan speed indication. 3.6 Digital Output (VOUT) VOUT is an active-high complimentary output that drives the base of an external NPN transistor (via an appropriate base resistor) or the gate of an N-channel MOSFET. This output has asymmetrical drive. During a fan fault condition, the VOUT output is continuously on. 3.7 Power Supply Input (VDD) The VDD pin with respect to GND provides power to the device. This bias supply voltage may be independent of the fan power supply. 3.8 Ground (GND) Ground terminal. 3.9 No Connect (NC) No internal connection. Pin Name Function 1VIN Analog Input 2CF Analog Output 3VAS Analog Input 4 GND Ground 5 SENSE/NC Analog Input/No Connect. NC for TC648B. 6FAULT/OTF Digital (Open-Drain) Output OTF for TC648B 7VOUT Digital Output 8VDD Power Supply Input |
Número de pieza similar - TC646BEPA |
|
Descripción similar - TC646BEPA |
|
|
Enlace URL |
| Política de Privacidad |
| ALLDATASHEET.ES |
| ¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Spanish ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
