LV8805V

No.A1747-2/9

Allowable Operating Conditions

at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

VCC supply voltage

VCC

6 to 15

V

SOFTST input voltage range

VSOFTST

0 to VREG

V

FR input voltage range

VFR

0 to VREG

V

MINSP input voltage range

VMINSP

0 to VREG

V

Electrical Characteristics

at Ta

= 25°C, VCC = 12V, unless otherwise specified

Ratings

Parameter

Symbol

Conditions

min

typ

max

Unit

Circuit current 1

ICC1

2.6

3.6

mA

Charge pump block

Charge pump output voltage

VVG

17

V

Regulator block

5V regulator voltage

VVREG

4.75

5

5.25

V

Output on resistance

Sum of high-/low-side output transistor on

resistance

Ron (H+L)

IO = 0.7A, VCC = 12V, VG = 17V

1.2

2

Ω

Startup oscillator (OSC) pin

OSC pin charge current

IOSCC

-2.5

μA

OSC pin discharge current

IOSCD

2.5

μA

PWM input (PWMIN) pin

High-level input voltage range

VPWMINH

2.5

VREG

V

Low-level input voltage range

VPWMINL

0

1

V

Range of PWM input frequency

fPWMIN

15

60

kHz

Forward/reverse switching pin

High-level input voltage range

VFRH

Order of current application :

UOUT

→VOUT→WOUT

2.5

VREG

V

Low-level input voltage range

VFRL

Order of current application :

UOUT

→WOUT→VOUT

0

1

V

FG, 1/2FG, and RD output pins

FG output pin low-level voltage

VFG

When IO is 2mA

0.25

0.35

V

FG output pin leak voltage

ILFG

When VFG is 16V

1

μA

1/2FG output pin low-level voltage

V1/2FG

When IO is 2mA

0.25

0.35

V

1/2FG output pin leak voltage

IL1/2FG

When V1/2FG is 16V

1

μA

RD output pin low-level voltage

VRD

When IO is 2mA

0.25

0.35

V

RD output pin leak voltage

ILRD

When VRD is 16V

1

μA

Current limiter circuit

Limiter voltage

VRF

Limit current set to 1A when RF is 0.25

Ω.

0.225

0.25

0.275

V

Constraint protection circuit

CT pin high-level voltage

VCTH

2.25

2.8

2.95

V

CT pin low-level voltage

VCTL

0.43

0.5

0.65

V

CT pin charge current

ICTC

-2.9

-2.5

-2.2

μA

CT pin discharge current

ICTD

0.21

0.25

0.32

μA

ICT charge/discharge ratio

RCT

7

10

13

Soft start circuit

Soft start releasing voltage

VSOFTST

2.5

V

SOFTST pin charge current

ISOFTST

0.6

μA

Thermal protection circuit

Thermal protection circuit operating

temperature

TSD

Design target *

150

180

210

°C

* : Design target value and no measurement is made. The thermal protection circuit is incorporated to protect the IC from burnout or thermal destruction. Since

it operates outside the IC's guaranteed operating range, the customer's thermal design should be performed so that the thermal protection circuit will not be

activated when the fan is running under normal operating conditions.