REV. –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.
6 NC No 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.
D
EP Exposed Pad
The exposed pad on the bottom of the package must be connected to V
CC
or the
GND plane.
