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| 型号： | ADN8830ACPZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/22页 |
| 文件大小： | 0K |
| 描述： | IC THERMO COOLER CNTRLR 32-LFCSP |
| 标准包装： | 1 |
| 应用： | 热电冷却器 |
| 电流 - 电源： | 8mA |
| 电源电压： | 3.3 V ~ 5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 32-LFCSP-VQ（5x5） |
| 包装： | 剪切带 (CT) |
| 其它名称： | ADN8830ACPZ-REELCT |
ADN8830
APPLICATION NOTES
Principle of Operation
The ADN8830 is a controller for a TEC and is used to set and
stabilize the temperature of the TEC. A voltage applied to the
input of the ADN8830 corresponds to a target temperature
setpoint. The appropriate current is then applied to the TEC
to pump heat either to or away from the object whose tem-
perature is being regulated. The temperature of the object is
measured by a thermistor and is fed back to the ADN8830 to
correct the loop and settle the TEC to the appropriate final
temperature. For best stability, the thermistor should be mounted
in close proximity to the object. In most laser diode modules,
the TEC and thermistor are already mounted in the unit and
are used to regulate the temperature of the laser diode.
A complete TEC controller solution requires:
? A precision input amplifier stage to accurately measure the
difference between the target and object temperatures.
? A compensation amplifier to optimize the stability and
temperature settling time.
? A high output current stage. Because of the high output
currents involved, a TEC controller should operate with
high efficiency to minimize the heat generated from
power dissipation.
SYNCOUT
In addition, an effective controller should operate down to 3.3 V
and have an indication of when the target temperature has been
reached. The ADN8830 accomplishes all of these requirements
with a minimum of external components. Figure 1 shows a
reference design for a typical application.
Temperature is monitored by connecting the measurement
thermistor to a precision amplifier, called the error amplifier,
with a simple resistor divider. This voltage is compared against
the temperature set input voltage, creating an error voltage that
is proportional to their difference. To maintain accurate wave-
length and power from the laser diode, this difference voltage
must be as accurate as possible. For this reason, self-correction
auto-zero amplifiers are used in the input stage of the ADN8830,
providing a maximum offset voltage of 250 μ V over time and
temperature. This results in final temperature accuracy within
± 0.01 ° C in typical applications, eliminating the ADN8830 as an
error source in the temperature control loop. A logic output is
provided at TEMPLOCK to indicate when the target temperature
has been reached.
The output of the error amplifier is then fed into a compensa-
tion amplifier. An external network consisting of a few resistors
and capacitors is connected around the compensation amplifier.
This network can be adjusted by the user to optimize the step
TEMPOUT
C1
0.1 F
R1
150k
32
31
30
29
28
27
26
25
3.3V
L1
4.7 H
COILCRAFT
THERMFAULT
1
24
DO3316-472
TEC–
THERMIN
C2
RTH
10k
@25 C
R2
7.68k
0.1%
VREF
2
23
Q1
FDW2520C-B
22 F
CDE ESRD
3.3V
3
22
Q2
TEMPSET
R3
10k
4
ADN8830
21
FDW2520C-A
0.1%
TEMPLOCK
R4
7.68k
0.1%
5
6
20
19
C3
10 F
C4
22 F
CDE ESRD
3.3V
3.3V
VREF
7
18
C5
10nF
3.3V
C8
8
17
3.3V
C7
10 F
10 F
9
10
11
12
13
14
15
16
Q3
R5
205k
C9
10 F
C6
2.2nF
FDW2520C-A
C11
1 F
R7
1M
R6
100k
C10
330pF
VTEC
Q4
FDW2520C-B
TEC+
C12
3.3nF
Figure 1. Typical Application Schematic
REV. D
–7 –
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相关代理商/技术参数 |
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| ADN8830ACPZ-REEL7 | 功能描述:IC THERMO COOLER CTRLR 32-LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
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