FAN8048 查看數據表（PDF） - Fairchild Semiconductor

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FAN8048

2 DC-DC Converter & 4-CH PWM Motor IC

Fairchild Semiconductor 

FAN8048

Electrical characteristics

(PVCC=VIN=2.4V, VSYS1=VSYS2=2.7V, VG=7.0V, DCIN=0V, CPCT=470pF, Ta=25°C,unless otherwise specifid)

Parameter

Symbol

Conditions

CURRENT

PVCC quiescent current

IPVCC

-

VIN operating current

IVIN VON = 0V

DCIN operating current

IDCIN DCIN = 5V

VG operating current1

IVG Non driving 4 channels

VG operating current2 (Note1)

IVG4CH Driving by 4 channels

VSYS1 operating current

IVSYS1

VSYS2 operating current

IVSYS2

SYNCHRONOUS DC-DC CONVERTER PART

VG CONVERTER PART

VG output voltage

VVG IVG=1mA

VG converter start voltage

VVGST VG=3 → 5V Sweep

Oscillation frequency

FLG VG=3.5V, VLG=5V

STEP UP/DOWN CONVERTER (COMMON))

VSYS voltage at voltage up mode

VUP VIN=2.0V, ISYS=100mA

VSYS Load Stability at voltage up

mode

∆VUP VIN=2.0V, ISYS=0 to 150mA

VSYS voltage at voltage down mode VDOWN VIN=3.0V, ISYS=100mA

VSYS load stability at voltage down

mode

∆VDOWN

VIN=3.0V, ISYS=0 to 150mA

VSYS output stability at voltage up/down ∆VUPDW ∆VUPDW=VUP-VDOWN

ERROR AMPLIFIER

Error amplifier threshold voltage

VEINTH

-

Error amplifier output voltage

VEOL

-

Error amplifier input current

IEIN VEI=0.8V

Error amplifier source current

IESOURCE VEO=0V, VEI=0V

Error amplifier sink current

IESINK

-

VSYS1 OPTION CIRCUIT

Error amplifier1 short circuit

detection voltage

Veos SPRT=L → H

SPRT input current1

Isprt1 VEI=0V, VSPRT=0V

SPRT input current2

Isprt2 OFF=VSPRT=0V

SPRT threshold voltage

Vsprth

VPCT=0.3V, VEO=0.4V,VEI=0V,

DSW=H → L

SOFT input current

Isoft VSOFT=0V

SPRT/SOFT discharge reset voltage Vdis

VSYS1=1.3 → 1.7V

VSPRT, VSOFT=L → H

Voltage in switching between the

starter and normal modes

Vstn VSYS1=1.5 →2.0 V,DSW=H → L

Vstn hysterisis voltage (Note1)

Vsthys VSYS1=1.5 →2.0 V

Min. Typ. Max. Unit

-

- 3.0 µA

- 1.6 3.0 mA

-

- 1.0 mA

- 1.0 1.5 mA

- 1.5 2.0 mA

- 3.0 5.0 mA

-

- 1.0 mA

6.0 7.0 8.0 V

3.3 3.9 4.5 V

65 100 135 KHz

2.58 2.7 2.82 V

-30 1.0 30 mV

2.58 2.7 2.82 V

-30 1.0 30 mV

-30 0 30 mV

0.86 0.9 0.94 V

- 0.16 0.2 V

-1 0.1 1 µA

150 -

- µA

1

-

- mA

1.20 1.35 1.45 V

-9 -6 -4 µA

-16 -12 -8 µA

0.4 0.5 0.6 V

-13 -10 -7 µA

1.30 1.48 1.62 V

1.70 1.84 1.95 V

100 200 300 mV

7

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