A8284SB 데이터 시트보기 (PDF) - Allegro MicroSystems

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A8284SB

TWO-OUTPUT LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR

Allegro MicroSystems 

8284

TWO-OUTPUT LNB SUPPLY AND

CONTROL-VOLTAGE REGULATOR

ELECTRICAL CHARACTERISTICS at TA = 25°C, OSEL = H for LNBB, OSEL = L for LNBA (each

output tested separately), ENT = L, EN = H, LLC = L, VIN = 24 V, IO = 50 mA (unless otherwise

noted).

Characteristic

Supply Voltage

Output Voltage

Symbol

VIN

VO

Line Regulation

∆VO

Load Regulation

Current-Limiting Threshold

Tone Frequency

Tone Amplitude

Tone Duty Cycle

Tone Rise or Fall Time

External Modulation Gain

External Modulation

Input Voltage

∆VO

VOM(th)

ftone

Vtone(PP)

dctone

tr, tf

Gmod

Vmod(PP)

Test Conditions

IO = 600 mA, VSEL0 = L, VSEL1 = L, LLC = L

IO = 600 mA, VSEL0 = L, VSEL1 = L, LLC = L

IO = 600 mA, VSEL0 = L, VSEL1 = L, LLC = H

IO = 600 mA, VSEL0 = L, VSEL1 = H, LLC = L

IO = 600 mA, VSEL0 = L, VSEL1 = H, LLC = H

IO = 600 mA, VSEL0 = H, VSEL1 = L, LLC = L

IO = 600 mA, VSEL0 = H, VSEL1 = L, LLC = H

IO = 600 mA, VSEL0 = H, VSEL1 = H, LLC = L

IO = 600 mA, VSEL0 = H, VSEL1 = H, LLC = H

VO = 13 V, VI = 16 to 40 V

VO = 18 V, VI = 21 to 40 V

VO = 13 or 18 V, IO = 50 to 600 mA

ENT = H

ENT = H

ENT = H

ENT = H

∆VO/∆Vmod, f = 10 Hz to 40 kHz

AC coupling

Limits

Min. Typ. Max. Units

— 3.3 + ∆VBUCK 47

V

12.5 13 13.5 V

13.4 14 14.6 V

17.3 18 18.7 V

18.2 19 19.8 V

11.5 12 12.5 V

12.5 13 13.5 V

19.2 20 20.8 V

20.2 21 21.8 V

— 4.0 40 mV

— 4.0 40 mV

— 80 180 mV

125 135 145 mV

20 22 24 kHz

550 680 800 mV

40

50

60

%

5.0 10 15 µs

— 5.0 — V/V

—

— 160 mV

External Modulation

Impedance

Zmod

f = 10 Hz to 40 kHz

— 5.0 — kΩ

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