收藏本站

Data Sheet
THEORY OF OPERATION
The ADN8831 is a single chip TEC controller that sets and
stabilizes a TEC temperature. A voltage applied to the input
of the ADN8831 corresponds to a target TEC temperature
setpoint (TEMPSET). By controlling an external FET H-bridge,
the appropriate current is then applied to the TEC to pump
heat either to or away from an object attached to the TEC.
The objective temperature is measured with a thermal sensor
attached to the TEC and the sensed temperature (voltage) is
fed back to the ADN8831 to complete a closed thermal control
loop of the TEC. For best stability, the thermal sensor is to be
closed to the object. In most laser diode modules, a TEC and a
NTC thermistor are already mounted in the same package to
regulate the laser diode temperature.
The ADN8831 integrates two self-correcting, auto-zero amplifiers
(Chop1 and Chop2). The Chop1 amplifier usually takes a thermal
sensor input and converts or regulates the input to a linear
voltage output. The OUT1 (Pin 4) voltage is proportional to the
object temperature. The OUT1 (Pin 4) voltage is fed into the
compensation amplifier (Chop2) and compared with a tempera-
ture setpoint voltage, creating an error voltage that is proportional
to the difference. When using the Chop2 amplifier, a PID
network is recommended, as shown in Figure 12.
ADN8831
Adjusting the PID network optimizes the step response of
the TEC control loop. A compromised settling time and the
maximum current ringing become available when this is done.
Details of how to adjust the compensation network are in the
PID Compensation Amplifier (CHOP2) section. The TEC is
differentially driven in an H-bridge configuration. The ADN8831
drives external MOSFET transistors to provide the TEC current.
To further improve the power efficiency of the system, one side
of the H-bridge uses a PWM driver. Only one inductor and one
capacitor are required to filter out the switching frequency. The
other side of the H-bridge uses linear output without requiring
any additional circuitry. This proprietary configuration allows
the ADN8831 to provide efficiency of >90%. For most applica-
tions, a 4.7 μH inductor, a 22 μF capacitor, and a switching
frequency of 1 MHz, maintain less than 0.5% worst-case output
voltage ripple across a TEC.
The maximum voltage across the TEC and current flowing
through the TEC is to be set using the VLIM (Pin 31) and
ILIMC (Pin 1)/ILIMH (Pin 32). Additional details are in the
Maximum TEC Voltage Limit section and the Maximum TEC
Current Limit section.
5?
VDD
VREF
AVDD
0.1μF
PVDD
0.1μF
LPGATE
3.0V TO 5.5V
17.8k?
0.1μF
10k?
8.2k?
8.2k?
10k?
10k?
10k?
10k?
VLIM
ILIMC
ILIMH
IN1P
LFB
LNGATE
CS
COMPSW
SFB
R SENSE
0.1μF
TEC
7.68k?
THERMISTOR
17.8k?
10k?
IN1N
OUT1
SYNCI/SD
COMPOSC
1 0k ?
VDD
60μF
27nF
30.1k?
10μF
IN2N
OUT2
SPGATE
SW
SNGATE
1 k?
3.3μH
40μF
TEMPERATURE SET INPUT
TEC VOLTAGE OUTPUT
TEC CURRENT OUTPUT
IN2P
VTEC
ITEC
SYNCO
PHASE
SS/SB
NC
NC
0.1μF
TEMP GOOD INDICATOR
TMPGD
AGND
PGND
FREQ
118k?
NC = NO CONNECT
Figure 12. Typical Application Circuit 1
Rev. A | Page 11 of 20
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ADP1043AFB100EVALZ BOARD EVALUATION ADP1043A 100W
ADP1046-100-EVALZ BOARD EVAL FOR ADP1046-100
ADP1048-600-EVALZ BOARD EVAL ADP1048-600
ADP190CB-EVALZ BOARD EVAL ADP190
ADP191CB-EVALZ EVAL BOARD FOR ADP191
ADP194CB-EVALZ BOARD EVAL FOR ADP194ACBZ
ADP195CP-EVALZ BOARD EVAL FOR ADP195ACPZ
ADP197CB-EVALZ BOARD EVAL FOR ADP197ACBZ
相关代理商/技术参数
ADN8831XCP 制造商:Analog Devices 功能描述:- Bulk
ADN8833ACBZ-R7 功能描述:IC THERMO COOLER DRIVER 25WLCSP 制造商:analog devices inc. 系列:* 零件状态:在售 标准包装:1
ADN8833ACPZ-R2 功能描述:IC THERMO COOLER DRIVER 24LFCSP 制造商:analog devices inc. 系列:- 包装:剪切带（CT） 零件状态:在售 应用:热电冷却器 电流 - 电源:2.1mA 电压 - 电源:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-WFQFN 裸露焊盘，CSP 供应商器件封装:24-LFCSP-WQ（4x4） 标准包装:1
ADN8833ACPZ-R7 功能描述:IC THERMO COOLER DRIVER 24LFCSP 制造商:analog devices inc. 系列:- 包装:剪切带（CT） 零件状态:在售 应用:热电冷却器 电流 - 电源:2.1mA 电压 - 电源:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-WFQFN 裸露焊盘，CSP 供应商器件封装:24-LFCSP-WQ（4x4） 标准包装:1
ADN8833CB-EVALZ 功能描述:ADN8833 - Power Management, Thermoelectric Cooler Evaluation Board 制造商:analog devices inc. 系列:- 零件状态:有效 主要用途:电源管理，热电冷却器 嵌入式:- 使用的 IC/零件:ADN8833 主要属性:2.7 V ~ 5.5 V 输入电压 辅助属性:- 所含物品:板 标准包装:1
ADN8833CP-EVALZ 功能描述:ADN8833 - Power Management, Thermoelectric Cooler Evaluation Board 制造商:analog devices inc. 系列:- 零件状态:有效 主要用途:电源管理，热电冷却器 嵌入式:- 使用的 IC/零件:ADN8833 主要属性:2.7 V ~ 5.5 V 输入电压 辅助属性:- 所含物品:板 标准包装:1
ADN8834ACBZ-R7 功能描述:IC THERMO COOLER DRIVER 25WLCSP 制造商:analog devices inc. 系列:* 零件状态:在售 标准包装:1
ADN8834ACPZ-R2 功能描述:Thermoelectric Cooler PMIC 24-LFCSP-WQ (4x4) 制造商:analog devices inc. 系列:- 包装:剪切带（CT） 零件状态:有效 应用:热电冷却器 电流 - 电源:3.3mA 电压 - 电源:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-WFQFN 裸露焊盘，CSP 供应商器件封装:24-LFCSP-WQ（4x4） 标准包装:1