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ADN8831ACPZ-REEL7 Arkusz danych(PDF) 7 Page - Analog Devices

Numer części ADN8831ACPZ-REEL7
Szczegółowy opis  Thermoelectric Cooler (TEC) Controller
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ADN8831ACPZ-REEL7 Arkusz danych(HTML) 7 Page - Analog Devices

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Data Sheet
ADN8831
Rev. A | Page 7 of 20
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
NOTES
1. THE LFCSP PACKAGE HAS AN EXPOSED PADDLE
THAT SHOULD BE CONNECTED TO AGND (PIN 12)
AND THE ASSOCIATED PCB GROUND PLANE.
PIN 1
INDICATOR
1
ILIMC
2
IN1P
3
IN1N
4
OUT1
5
IN2P
6
IN2N
7
OUT2
8
VREF
24 COMPSW
23 SFB
22 PGND
21 SNGATE
20 SW
19 SPGATE
18 PVDD
17 COMPOSC
TOP VIEW
(Not to Scale)
ADN8831
Figure 3. Pin Configuration
Table 4. Pin Function Descriptions
Pin No.
Mnemonic
Type
Description
1
ILIMC
Analog Input
Sets TEC Cooling Current Limit.
2
IN1P
Analog Input
Noninverting Input to Error Amplifier.
3
IN1N
Analog Input
Inverting Input to Error Amplifier.
4
OUT1
Analog Output
Output of Error Amplifier.
5
IN2P
Analog Input
Noninverting Input to Compensation Amplifier.
6
IN2N
Analog Input
Inverting Input to Compensation Amplifier.
7
OUT2
Analog Output
Output of Compensation Amplifier.
8
VREF
Analog Output
2.5 V Voltage Reference Output.
9
AVDD
Power
Power for Nondriver Sections. 3.0 V minimum; 5.5 V maximum.
10
PHASE
Analog Input
Sets SYNCO Clock Phase Relative to SYNCI/SD Clock.
11
TMPGD
Digital Output
Logic Output. Active high. Indicates when the OUT1 voltage is within ±100 mV of IN2P voltage.
12
AGND
Ground
Analog Ground. Connect to low noise ground.
13
FREQ
Analog Input
Sets Switching Frequency with an External Resistor.
14
SS/SB
Analog Input
Sets Soft Start Time for Output Voltage. Pull low (VTEC = 0 V) to put the ADN8831 into standby
mode.
15
SYNCO
Digital Output
Phase Adjustment Clock Output. Phase set from PHASE pin. Used to drive SYNCI/SD of other
ADN8831 devices.
16
SYNCI/SD
Digital Input
Optional Clock Input. If not connected, clock frequency is set by FREQ pin. Pull low to put
the ADN8831 into shutdown mode. Pull high to negate shutdown mode.
17
COMPOSC
Analog Output
Compensation for Oscillator. Connect to PVDD when in free-run mode, connect to R-C
network when in external clock mode.
18
PVDD
Power
Power for Output Driver Sections. 3.0 V minimum; 5.5 V maximum.
19
SPGATE
Analog Output
PWM Output Drives External PMOS Gate.
20
SW
Analog Input
Connects to PWM FET Drains.
21
SNGATE
Analog Output
PWM Output Drives External NMOS Gate.
22
PGND
Ground
Power Ground. External NMOS devices connect to PGND. Connect to digital ground.
23
SFB
Analog Input
PWM Feedback. Connect to the TEC module negative (−) terminal.
24
COMPSW
Analog Input
Compensation Pin for Switching Amplifier.
25
LPGATE
Analog Output
Linear Output Drives External PMOS Gate.
26
LNGATE
Analog Output
Linear Output Drives External NMOS Gate.
27
LFB
Analog Input
Linear Feedback. Connect to H-Bridge transistor output and current sense resistor.
28
CS
Analog Input
Linear Feedback. Connect to the TEC module positive (+) terminal.
29
ITEC
Analog Output
Indicates TEC Current.


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