Diodes AP432_A Manuel d'utilisateur télécharger pdf (Page 3)

AP432/AP432A

Document number: DS31003 Rev. 18 - 2

3 of 15

www.diodes.com

September 2012

AP432/AP432A

Electrical Characteristics (@T

= +25°C, unless otherwise specified.)

Symbol Parameter Test Conditions Min Typ Max Unit

REF

Reference voltage

= V

REF

= 10mA (Figure 1)

AP432

AP432A

1.227

1.233

1.24

1.252

1.246

REF

Deviation of reference input voltage over

temperature

(Note 4)

= V

REF

, I

= 10mA,

Ta = Full range (Figure 1)

⎯

3.0 20 mV

ΔV

REF

ΔV

Ratio of the change in reference voltage to

the change in cathode voltage

= 10mA (Figure 2) V

= 20 ~ V

REF

⎯

-1.4 -2.0 mV/V

REF

Reference input current R1 = 10KΩ,R2 = ∞ I

= 10mA (Figure 2)

⎯

1.4 3.5 µA

αI

REF

Deviation of reference input current over

temperature

R1 = 10KΩ,R2 = ∞ I

= 10mA

= Full range (Figure 2)

⎯

0.4 1.2 µA

KA(MIN)

Minimum cathode current for regulation V

= V

REF

(Figure 1)

⎯

0.15 0.3 mA

KA(OFF)

Off-state current V

= 36V, V

REF

= 0V (Figure 3)

⎯

0.1 1.0 µA

Dynamic output impedance

(Note 5)

= V

REF

= V

REF

ΔI

= 0.1mA ~ 15mA

Frequency

≤

1KHz (Figure 1)

⎯

0.2 0.5 Ω

VMAX

VMIN

TI T2

Temperature

DEV = VMAX - VMIN

Notes: 6. Deviation of reference input voltage, V

DEV

, is defined as the maximum variation of the reference over the full temperature range.

The average temperature coefficient of the reference input voltage

αV

REF

is defined as:

10)

C)(25

REF

DEV

(

REF

Vα

−

⋅

……………………..……………….. (

)

ppm

Where:

T2 – T1 = full temperature change.

αV

REF

can be positive or negative depending on whether the slope is positive or negative.

Notes: 7. The dynamic output impedance, R

, is defined as:

When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output impedance of the overall circuit, is

defined as:

)

Z +

= ≈

1 2 3 4 5 6 7 8 ... 14 15

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