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ADN8834ACBZ-R7 其他数据使用手册 - ADI（亚德诺）
制造商:
ADI（亚德诺）
分类:
电池管理芯片
封装:
WFBGA-25
描述:
热电冷却器
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3D模型
符号图
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引脚图
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页面导航:
引脚图在P7P27Hot
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原理图在P1P12P18P23
封装尺寸在P27
型号编码规则在P27
功能描述在P1P7P27
技术参数、封装参数在P1P3P6
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ADN8834ACBZ-R7数据手册
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Ultracompact, 1.5 A Thermoelectric Cooler
(TEC) Controller
Data Sheet
ADN8834
FEATURES
Patented high efficiency single inductor architecture
Integrated low R
DSON
MOSFETs for the TEC controller
TEC voltage and current operation monitoring
No external sense resistor required
Independent TEC heating and cooling current limit settings
Programmable maximum TEC voltage
2.0 MHz PWM driver switching frequency
External synchronization
Two integrated, zero drift, rail-to-rail chopper amplifiers
Capable of NTC or RTD thermal sensors
2.50 V reference output with 1% accuracy
Temperature lock indicator
Available in a 25-ball, 2.5 mm × 2.5 mm WLCSP or in a
24-lead, 4 mm × 4 mm LFCSP
APPLICATIONS
TEC temperature control
Optical modules
Optical fiber amplifiers
Optical networking systems
Instruments requiring TEC temperature control
FUNCTIONAL BLOCK DIAGRAM
TEC CURRENT
AND VOLTAGE
SENSE AND LIMIT
CONTROLLER
LINEAR
POWER
STAGE
TEC DRIVER
PWM
POWER
STAGE
OSCILLATOR
VOLTAGE
REFERENCE
OUT1
VLIM/
SD VTECILIM PVINITEC
EN/SYVREF
LDR
SFB
IN2P
IN2N
IN1P
IN1N
OUT2
SW
PGNDx
VDD
AGND
ERROR
AMP
COMP
AMP
12954-001
Figure 1.
GENERAL DESCRIPTION
The ADN8834 is a monolithic TEC controller with an integrated
TEC controller. It has a linear power stage, a pulse-width
modulation (PWM) power stage, and two zero-drift, rail-to-rail
operational amplifiers. The linear controller works with the PWM
driver to control the internal power MOSFETs in an H-bridge
configuration. By measuring the thermal sensor feedback
voltage and using the integrated operational amplifiers as a
proportional integral differential (PID) compensator to condition
the signal, the ADN8834 drives current through a TEC to settle
the temperature of a laser diode or a passive component attached
to the TEC module to the programmed target temperature.
The ADN8834 supports negative temperature coefficient (NTC)
thermistors as well as positive temperature coefficient (PTC)
resistive temperature detectors (RTD). The target temperature is
set as an analog voltage input either from a digital-to-analog
converter (DAC) or from an external resistor divider.
The temperature control loop of the ADN8834 is stabilized by
PID compensation utilizing the built in, zero drift chopper
amplifiers. The internal 2.50 V reference voltage provides a 1%
accurate output that is used to bias a thermistor temperature
sensing bridge as well as a voltage divider network to program
the maximum TEC current and voltage limits for both the heating
and cooling modes. With the zero drift chopper amplifiers,
extremely good long-term temperature stability is maintained via
an autonomous analog temperature control loop.
Table 1. TEC Family Models
Device No. MOSFET Thermal Loop Package
ADN8831 Discrete Digital/analog LFCSP (CP-32-7)
ADN8833 Integrated Digital
WLCSP (CB-25-7),
LFCSP (CP-24-15)
ADN8834 Integrated Digital/analog
WLCSP (CB-25-7),
LFCSP (CP-24-15)
Rev. A Document Feedback
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