TL496C, TL496Y

9-VOLT POWER-SUPPLY CONTOLLERS

SLVS012B – AUGUST 1978 – REVISED AUGUST 1995

4–5

POST OFFICE BOX 655303

APPLICATION INFORMATION

75

1

4

2

36

8

1C INPUT

SW

OUTPUT

FEEDBACK

GND

GND

T INPUT

2C INPUT

TL496C

L

OUTPUT

GND

D1

T1

CIRCUIT COMPONENT INFORMATION

D1: 1N4001

CO: 330 µF to 470 µF, 10 V, electrolytic

L: 40

µH to 50 µH, Q ≈ 3, R < 0.15 Ω

T1: Vsec = 6.8 V RMS typ, Rsec = 11 Ω typ

CO

BATT

AC

INPUT

Figure 1. One-Cell Operation

T1

D1

GND

OUTPUT

L

TL496C

2C INPUT

T INPUT

GND

GND

FEEDBACK

OUTPUT

SW

1C INPUT

8

6

3

2

41

5

7

CIRCUIT COMPONENT INFORMATION

D1: 1N4001

CO: 330 µF to 470 µF, 10 V, electrolytic

L: 40

µH to 50 µH, Q ≈ 3, R < 0.15 Ω

T1: Vsec = 6.8 V RMS typ, Rsec = 11 Ω typ

CO

AC

INPUT

BATT

Figure 2. Two-Cell Operation

electrical characteristics for one- and two-cell input operations

PARAMETER

ONE-CELL OPERATION

(see Figure 1)

TWO-CELL OPERATION

(see Figure 2)

Input current

No load

125

µA

125

µA

Input current

RL = 120 Ω

525 mA

405 mA

Output voltage

No ac input

7.2 V

8.6 V

Output voltage

With ac input

8.6 V

10 V

Output current capability

40 mA

80 mA

Efficiency

66%

66%

Battery life (AA NiCad) no load

60 days

166 days