Power ICs with a Watchdog Timer Function

LA5693AM/93D/93M

Rechargeable Batteryry ChargeCharge ControlControl ICsICs

LA5636M

■Applications

Microcontroller systems for use in automobiles and other industrial equipment

unit: mm

unit: mm

 

9.14

 

5.0

8

5

5

 

8

■ Applications

unit: mm

DC-DC converter secondary side control IC

 

5.0

 

0.63

10

 

6

 

 

■Functions/Features

●An external PNP transistor can be used to provide a low-saturation voltage regulator

●Since the CK input has no edge detector, a high degree of flexibility is allowed in applications (LA5693AM)

●Variable detection voltage (LA5693AM)

●Watchdog time can be made longer (LA5693AM)

●5V output voltage power supply controller (LA5693D/93M)

●Built-in watchdog timer (LA5693D/93M)

●Power supply reset signal generation function (LA5693D/93M)

●Reset hold output RES(2) (cleared with CK reinput) (LA5693D/93M)

 

 

 

6.4

7.62

 

 

 

 

 

 

 

 

 

4.4

6.4

 

 

1

4

0.25

 

 

0.63

 

1.0

 

1.4

 

 

 

 

1

 

4

 

 

 

 

 

 

 

3.9MAX

(3.0)

 

 

(0.65)

1.27

0.35

0.15

 

 

 

 

 

 

3.2

0.51MIN

 

 

 

 

(1.5)

1.7max

 

(0.76)

2.54

0.5

 

 

 

 

 

 

 

 

 

 

0.1

 

 

 

 

SANYO: DIP8(300mil)

SANYO: MFP8(225mil)

■Functions/Features

●Built-in circuit that prevents system malfunction when the input voltage (car battery voltage) falls.

●Provides a constant voltage output that in proportion to the PWM input signal (permits output voltage control by microcontroller)

●High-precision reference current (current control amp) 92.5μA ± 2.7%

●Output voltage can be set through an external resistor.

●Each loop of the voltage amp and current amp is independent.

 

 

 

4.4

6.4

1

 

5

1.7max

0.15

 

 

 

 

 

 

 

 

 

 

(1.5)

 

 

 

 

0.1

 

0.35

1.0

 

(0.5)

 

SANYO: MFP10S(225mil)

Absolute maximum

Total power dissipation

 

Package

Function reset

Watchdog time typ

ratings input voltage

 

logic output

(Ct=2μF)

 

 

 

 

 

 

 

 

 

 

 

41V

0.37W

(LA5693AM)

MFP8(225mil)

(LA5693AM/93M)

Inverted

40ms

0.5W

(LA5693D/93M)

DIP8(300mil)

(LA5693D)

 

 

 

 

 

 

 

 

 

 

Block Diagram

VCC

 

 

 

 

 

 

 

 

VO

 

 

 

 

+

 

R8 390kΩ

 

 

+

 

 

 

 

 

 

 

 

 

 

 

 

C in

 

 

 

 

Co

 

 

 

 

10μF

 

VCONT

VO

100μF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

3

 

 

 

 

 

Error AMP

 

 

 

10kΩ

VDD

TR2

R6

 

 

Start VREF

 

 

 

2SA1258

 

R3

 

 

 

 

 

1.1kΩ

 

Up

 

 

 

 

CPU

 

 

10kΩ

 

 

 

 

 

 

R4

 

 

 

 

RES(1)

 

 

 

 

 

 

 

 

 

R7

1kΩ

 

 

 

 

 

6

RES

D1

2.2kΩ

 

 

 

 

RESET

 

RES(2)

 

 

 

 

 

 

 

 

DS135E

TR3

R5

 

 

GENERATOR

2

DO

 

 

 

 

 

 

2SC3031

 

 

 

 

 

 

 

750kΩ

 

VOUT

 

 

 

 

 

 

 

 

 

WDT

 

 

VSS

 

 

 

 

 

 

 

 

 

 

 

DETECTOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15kΩ

 

 

 

 

 

 

 

 

15kΩ

 

4 GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

8

7

 

 

 

 

 

 

 

VS

 

CK

Ct

 

 

 

 

 

 

 

μF

C ck

 

 

 

 

 

 

 

 

0.01

 

 

 

 

 

 

 

 

 

 

R1

 

 

 

 

 

 

 

 

 

+

Ct

 

 

 

 

 

 

 

 

R2

 

 

 

Battery type

Absolute maximum

Total power

Package

Functions/Features

ratings Input voltage

dissipation

 

 

 

Lithium-ion,

14.5V

0.36W MFP10S(225mil)

Car battery DC-DC converter control IC, output voltage proportional to

nickel-metal hydride

 

 

 

PWM input signal for charging lithium-ion batteries, etc.

 

 

 

 

Block Diagram

IN

 

 

 

VOUT

12V/24V

 

 

 

Batt

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DOUT

V+IN

V-IN C1

Isen+IN

Isen-IN

 

ICONST

 

 

 

3

 

10 9

8

7

 

6

 

 

2

 

 

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tr7

 

 

 

 

 

 

Tr1

 

 

 

 

 

R6

R8

 

Tr8

Tr9

 

 

 

+

 

 

 

 

 

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tr2

 

 

 

 

X1

 

R9

 

 

 

 

 

 

 

 

 

 

R7

+ X4

 

 

 

 

 

 

 

R3

 

 

 

Tr10

Tr11

 

 

 

Tr3 Tr6

 

 

 

 

+

 

 

 

 

 

 

 

 

 

10kΩ

 

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

2.0V

 

 

 

 

 

 

+

Tr4

 

 

 

 

 

 

 

 

 

+

 

 

 

 

 

 

 

 

X3

 

 

 

 

 

 

 

 

 

 

+

 

 

 

 

 

Tr 5

R2

+

R4

R5

 

 

Tr12

PWM

 

 

R10

 

 

 

 

 

X2

 

 

 

 

 

-

 

 

 

 

 

R1

 

-

 

 

 

 

 

 

 

 

 

4

 

 

33kΩ

 

200kΩ

30kΩ

1.6kΩ Tr13

+

1.25V

 

 

 

13kΩ

 

 

R11

 

 

 

 

 

 

 

 

Vref

 

 

-

 

 

 

 

 

 

 

 

 

 

2.5V

 

 

X5

 

Ω

 

 

 

GND

 

 

 

 

 

±1%

 

 

 

 

100k

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

PWM

GND A/D1 A/D2

Microcontroller

21

22