參數(shù)資料
型號(hào): AMC78L05PKF
廠商: Electronic Theatre Controls, Inc.
英文描述: 100mA / 3-TERMINAL 5V REGULATOR
中文描述: 百毫安/三端5V穩(wěn)壓器
文件頁(yè)數(shù): 18/28頁(yè)
文件大?。?/td> 468K
代理商: AMC78L05PKF
AMC7820
SBAS231B
www.ti.com
18
FIGURE 6. Soft Start Function.
TEC
Soft-Start
Controller
DAC0
(12 Bits)
6
7
48
47
1
46
2
SOFT_START_ENABLE
SOFT_START_CTR
SW4
SW2
SW3
OPA7_IN+
DAC0_OUT
DAC0_OUT_SET
OPA7_OUT
SW2_OUT
OPA7_IN
ON
OFF
Uni
Bip
R
R
EN
OPA7
OPA9
T_SENSE_Voltage
SW2_DISABLE
Unipolar_Bipolar_CTR
2.5V
To TEC
DRIVER
C
R
APPLICATION
The AMC7820 can be used to control one CW type laser
diode (or pump laser diode) current and one TEC cooler, two
TEC coolers, or two laser diodes. See Figure 7 for a typical
application to control one pump laser diode and one TEC. A
similar approach can be used to control other CW type laser
diodes.
TEC CONTROL
The TEC control loop is made up of the thermistor current
source, a unity-gain buffer, a thermostat DAC (DAC0), the
TEC integrator (OPA7), the internal TEC SOFT_START_
CONTROLLER, an external thermistor, and an external
TEC Power Current Driver.
The external thermistor is driven by the current from the
thermistor current source. The voltage across the thermistor
represents the actual TEC temperature, and is fed into the
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