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LA5612 データシート(PDF) 4 Page - Sanyo Semicon Device

部品番号 LA5612
部品情報  Multifunctional Voltage Regulator for TVs and VCRs with BS Tuner
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メーカー  SANYO [Sanyo Semicon Device]
ホームページ  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LA5612 データシート(HTML) 4 Page - Sanyo Semicon Device

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Function Table
(V: built in,
×: not built in)
Circuit block
Function
VO1VO2VO3
AMP A
AMP B
Input line
VIN1VIN2VIN2VIN1VIN1
Current limit
VVV
××
Thermal limit
VVV
××
On/off control
EN1
EN2
EN2
××
Usage Notes
(1) Apply voltage to the voltage input pins on condition that VIN1 ^ VIN2.
(2) Apply voltage simultaneously to VIN1 and VIN2. Do not use the LA5612 with voltage applied to only one of these pins.
(3) Since the amplifiers do not have current limit protection such as an external NPN transistor, provide this protection in each
application.
Logic Table
Conditions : when VIN1^ VIN2 (at VIN1 ^ 4V,VIN2 ^ 4V)
EN1,EN2
VO1, VO2, VO3
L or open
L
HH
(1) ‘‘H’’ for EN denotes high level; ‘‘L’’ denotes low level or open.
(2) ‘‘H’’ for VO denotes output ON voltage; ‘‘L’’ denotes output OFF voltage.
(3) Each output voltage corresponds to each EN and is controlled independently.
(EN1 is coupled with VO1, and EN2 with VO2 and VO3.)
Thermal Design Notes
(1) In the LA5612, the junction temperature (Tj) at which thermal shutdown is activated is approximately equal to 130°C.
(2) Consequently, the operating range of REG1, REG2 and REG3 with the thermal shutdown function is restricted by the thermal
shutdown characteristics (typical value) shown in the figure below.
(3) The thermal shutdown characteristics vary ±20°C or so. Since thermal shutdown is liable to occur with inadequate heat
dissipation, sufficient consideration must be given to the heat dissipation design.
Thermal Shutdown Characteristics
Typical Characteristics
Ambient temperature, Ta — °C
LA5612
No.5197 - 4/5


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