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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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EMC2103 датащи(PDF) 24 Page - Microchip Technology |
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EMC2103 датащи(HTML) 24 Page - Microchip Technology |
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24 / 85 page  RPM-Based Fan Controller with Hardware Thermal Shutdown Datasheet 2013 Microchip Technology Inc. DS0005250A-page 24 5.1.1 SHDN_SEL Pin The EMC2103 has a ‘strappable’ input (SHDN_SEL) allowing for configuration of the hardware Critical/Thermal Shutdown input channel. The pull-up resistor used on this pin identifies which configuration setting is used as shown in Table 5.1. . Note 5.1 For the EMC2103-1, the decode for a 22k Ohm resistor on the SHDN_SEL pin will be to use the External Diode 1 channel in Diode Mode (the same as the decode for a 6.8k Ohm resistor) as the hardware shutdown device. Note 5.2 Load from EEPROM enabled (EMC2103-4 only - see Section 4.9). 5.1.2 TRIP_SET Pin The EMC2103’s TRIP_SET pin is an analog input to the Critical/Thermal Shutdown block which sets the Thermal Shutdown temperature. The system designer creates a voltage level at the input through a simple resistor connected to GND as shown in Figure 5.2. The value of this resistor is used to create an input voltage on the TRIP_SET pin which is translated into a temperature ranging from 65°C to 127°C as shown in Table 5.2 APPLICATION NOTE: Current only flows when the TRIP_SET pin is being monitored. At all other times, the internal reference voltage is removed and the TRIP_SET pin will be pulled down to ground. APPLICATION NOTE: The TRIP_SET pin circuitry is designed to use a 1% resistor externally. Using a 1% resistor will result in the Thermal / Critical Shutdown temperature being decoded correctly. If a 5% resistor is used, then the Thermal / Critical Shutdown temperature may be decoded with as much as ±1°C error. Table 5.1 SHDN_SEL Pin Decode PULL UP RESISTOR MODE/SHUTDOWN CHANNEL EXTERNAL DIODE 1 CONFIG EXTERNAL DIODE 2 CONFIG < 4.7k Ohm AMD CPU on External Diode 1 Beta Compensation disabled REC disabled Beta and REC controls are locked Beta Compensation enabled (auto) REC enabled Beta and REC controls are not locked 6.8k Ohm 2N3904 on External Diode 1 Beta Compensation disabled REC enabled Beta and REC controls are locked Beta Compensation enabled (auto) REC enabled Beta and REC controls are not locked 10k Ohm Intel CPU on External Diode 1 Beta Compensation enabled and set to auto REC enabled Beta and REC controls are locked Beta Compensation enabled (auto) REC enabled Beta and REC controls are not locked 15k Ohm Internal Diode See Note 5.2 Beta Compensation enabled (auto) REC enabled Beta and REC controls are locked Beta Compensation enabled (auto) REC enabled Beta and REC controls are not locked 22k Ohm Intel CPU on External Diode 2 - see Note 5.1 and Note 5.2 Beta Compensation disabled REC enabled Beta and REC controls are not locked Beta Compensation enabled (auto) REC enabled Beta and REC controls are locked > 33k Ohm Intel CPU on External Diode 1 See Note 5.2 Beta Compensation enabled (auto) REC enabled Beta and REC controls are locked Beta Compensation enabled (auto) REC enabled Beta and REC controls are not locked |
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