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IRF7404 데이터시트(PDF) 4 Page - Analog Devices

부품명 IRF7404
상세설명  Thermoelectric Cooler Controller
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REV. C
–4–
ADN8830
PIN FUNCTION DESCRIPTIONS
Pin No.
Mnemonic
Type
Description
1
THERMFAULT
Digital Output
Indicates an Open or Short-Circuit Condition from Thermistor.
2
THERMIN
Analog Input
Thermistor Feedback Input.
3
SD
Digital Input
Puts Device into Low Current Shutdown Mode. Active low.
4
TEMPSET
Analog Input
Target Temperature Input.
5
TEMPLOCK
Digital Output
Indicates when Thermistor Temperature is within
±0.1°C of Target Tem-
perature as Set by TEMPSET Voltage.
6NCNo Connection, except as Noted in the Application Notes Section.
7
VREF
Analog Output
2.5 V Reference Voltage.
8
AVDD
Power
Power for Nondriver Sections. 3.0 V min; 5.5 V max.
9
OUT B
Analog Input
Linear Output Feedback. Will typically connect to TEC+ pin of TEC.
10
N2
Analog Output
Drives Linear Output External NMOS Gate.
11
P2
Analog Output
Drives Linear Output External PMOS Gate.
12
TEMPCTL
Analog Output
Output of Error Amplifier. Connects to COMPFB through feedforward
section of compensation network.
13
COMPFB
Analog Input
Feedback Summing Node of Compensation Amplifier. Connects to
TEMPCTL and COMPOUT through compensation network.
14
COMPOUT
Analog Output
Output of Compensation Amplifier. Connects to COMPFB through feed-
back section of compensation network.
15
VLIM
Analog Input
Sets Maximum Voltage across TEC.
16
VTEC
Analog Output
Indicates Relative Voltage across the TEC. The 1.5 V corresponds to 0 V
across TEC. The 3.0 V indicates maximum output voltage, maximum heat
transfer through TEC.
17
COMPSWOUT
Analog Output
Compensation for Switching Amplifier.
18
COMPSWIN
Analog Input
Compensation for Switching Amplifier. Capacitor connected between
COMPSWIN and COMPSWOUT.
19
OUT A
Analog Input
PWM Output Feedback. Will typically connect to TEC– pin of TEC.
20
PVDD
Power
Power for Output Driver Sections. 3.0 V min; 5.5 V max.
21
P1
Digital Output
Drives PWM Output External PMOS Gate.
22
N1
Digital Output
Drives PWM Output External NMOS Gate.
23
PGND
Ground
Power Ground. External NMOS devices connect to PGND. Can be
connected to digital ground as noise sensitivity at this node is not critical.
24
COMPOSC
Analog Input
Connect as Indicated in the Application Notes Section.
25
SYNCIN
Digital Input
Optional Clock Input. If not connected, clock frequency set by FREQ pin.
26
FREQ
Analog Input
Sets Switching Frequency.
27
SOFTSTART
Analog Input
Controls Initialization Time for ADN8830 with Capacitor to Ground.
28
SYNCOUT
Digital Output
Phase Adjusted Clock Output. Phase set from PHASE pin. Can be used to
drive SYNCIN of other ADN8830 devices.
29
PHASE
Analog Input
Sets Switching and SYNCOUT Clock Phase Relative to SYNCIN Clock.
30
AGND
Ground
Analog Ground. Should be low noise for highest accuracy.
31
TEMPOUT
Analog Output
Indication of Thermistor Temperature.
32
NC
No Connection.


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