FDR6674A View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

FDR6674A

Thermoelectric Cooler Controller

Analog Devices 

ADN8830

Pin No.

1

2

3

4

5

Mnemonic

THERMFAULT

THERMIN

SD

TEMPSET

TEMPLOCK

6

NC

7

VREF

8

AVDD

9

OUT B

10

N2

11

P2

12

TEMPCTL

13

COMPFB

14

COMPOUT

15

VLIM

16

VTEC

17

COMPSWOUT

18

COMPSWIN

19

OUT A

20

PVDD

21

P1

22

N1

23

PGND

24

COMPOSC

25

SYNCIN

26

FREQ

27

SOFTSTART

28

SYNCOUT

29

PHASE

30

AGND

31

TEMPOUT

32

NC

EP

Exposed Pad

PIN FUNCTION DESCRIPTIONS

Type

Digital Output

Analog Input

Digital Input

Analog Input

Digital Output

Analog Output

Power

Analog Input

Analog Output

Analog Output

Analog Output

Analog Input

Analog Output

Analog Input

Analog Output

Analog Output

Analog Input

Analog Input

Power

Digital Output

Digital Output

Ground

Analog Input

Digital Input

Analog Input

Analog Input

Digital Output

Analog Input

Ground

Analog Output

Description

Indicates an Open or Short-Circuit Condition from Thermistor.

Thermistor Feedback Input.

Puts Device into Low Current Shutdown Mode. Active low.

Target Temperature Input.

Indicates when Thermistor Temperature is within ± 0.1°C of Target Tem-

perature as Set by TEMPSET Voltage.

No Connection, except as Noted in the Application Notes Section.

2.5 V Reference Voltage.

Power for Nondriver Sections. 3.0 V min; 5.5 V max.

Linear Output Feedback. Will typically connect to TEC+ pin of TEC.

Drives Linear Output External NMOS Gate.

Drives Linear Output External PMOS Gate.

Output of Error Amplifier. Connects to COMPFB through feedforward

section of compensation network.

Feedback Summing Node of Compensation Amplifier. Connects to

TEMPCTL and COMPOUT through compensation network.

Output of Compensation Amplifier. Connects to COMPFB through feed-

back section of compensation network.

Sets Maximum Voltage across TEC.

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.

Compensation for Switching Amplifier.

Compensation for Switching Amplifier. Capacitor connected between

COMPSWIN and COMPSWOUT.

PWM Output Feedback. Will typically connect to TEC– pin of TEC.

Power for Output Driver Sections. 3.0 V min; 5.5 V max.

Drives PWM Output External PMOS Gate.

Drives PWM Output External NMOS Gate.

Power Ground. External NMOS devices connect to PGND. Can be

connected to digital ground as noise sensitivity at this node is not critical.

Connect as Indicated in the Application Notes Section.

Optional Clock Input. If not connected, clock frequency set by FREQ pin.

Sets Switching Frequency.

Controls Initialization Time for ADN8830 with Capacitor to Ground.

Phase Adjusted Clock Output. Phase set from PHASE pin. Can be used to

drive SYNCIN of other ADN8830 devices.

Sets Switching and SYNCOUT Clock Phase Relative to SYNCIN Clock.

Analog Ground. Should be low noise for highest accuracy.

Indication of Thermistor Temperature.

No Connection.

The exposed pad on the bottom of the package must be connected to VCC or the

GND plane.

–4–

REV. D

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