TA76432FC データシートの表示（PDF） - Toshiba

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TA76432FC

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic

Toshiba 

TA76432FT/FC/F/FR/S

Electrical Characteristics

(Unless otherwise specified, Ta = 25°C, IK = 5 mA)

Characteristics

Reference voltage

Deviation of reference input voltage

over temperature

Ratio of change in reference input

voltage to the change in cathode

voltage

Reference input current

Deviation of reference input current

over temperature

Minimum cathode current for

regulation

Off-State cathode current

Dynamic impedance

Symbol

Test Condition

VREF

VREF (dev)

ΔVREF/ΔV

IREF

IREF (dev)

VKA = VREF

0°C <= Ta <= 85°C, VKA = VREF

VREF <= VKA <= 5 V

5 V <= VKA <= 19 V

VKA = VREF

0°C <= Ta <= 85°C, VKA = VREF,

R1 = 10 kΩ, R2 = ∞

IKmin

VKA = VREF

IKoff

⎪ZKA⎪

VKA = 19 V, VREF = 0 V

V0.K5Am=AV<=REIKF,<=f

<= 1 kHz,

15 mA

Min Typ. Max Unit

1.242 1.26 1.278 V

⎯

3

15

mV

⎯

0.5

2.5

mV/V

⎯

0.3

2.0

⎯

2

4

μA

⎯

0.3

1.2

μA

⎯

0.2

0.5 mA

⎯

⎯

1.0

μA

⎯

0.2 0.5

Ω

The deviation parameters VREF (dev) and IREF (dev) are defined as the maximum variation of the VREF and IREF over the

rated temperature range.

The average temperature coefficient of the VREF is defined as:

VREF

max

min

VREF (dev)

⎜⎛ VREF (dev) × 106 ⎟⎞

αVREF = ⎜⎜⎝

VREF @25°C

ΔTa

⎟⎟⎠ (ppm °C)

ΔTa

Application Circuit Example

Error amplification circuit for the switching power supply

Photo-

coupler

VOUT

GND

Shunt regulator

This circuit amplifies the difference between the switching power supply’s secondary output voltage and the shunt

regulator’s reference voltage. It then feeds the amplified voltage back to the primary input voltage via the

photocoupler.

5

2011-09-29

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