MAX17014 Просмотр технического описания (PDF) - Maxim Integrated

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производитель

MAX17014

Low-Cost Multiple-Output Power Supply for LCD TVs

Maxim Integrated 

Low-Cost Multiple-Output

Power Supply for LCD TVs

Typical Operating Characteristics (continued)

(Circuit of Figure 1. VIN = VINL = VSUP = 12V, AVDD = 16V, VGON = 34.5V, VGOFF = -6V, VOUT1 = 3.3V, TA = +25°C, unless other-

wise noted.)

STEP-UP REGULATOR CURRENT LIMIT

vs. INPUT VOLTAGE

6.0

L1 = 4.7µH

5.5 (CDEP134NP-4R8M, ISAT = 9.3A)

5.0

AVDD = 16V

4.5

4.0

3.5

3.0

2.5

8

AVDD = 18V

9 10 11 12 13 14 15 16

INPUT VOLTAGE (V)

TIME-DELAY LATCH

SWITCHING FREQUENCY

RESPONSE TO OVERLOAD

vs. INPUT VOLTAGE

MAX17014 toc11

1.200

A

0V

B

0V

C

0V

D

A: VOUT, 5V/div

B: VAVDD, 10V/div

C: VGON, 50V/div

E

0V

200ms/div

D: VGOFF, 5V/div

E: L1 INDUCTOR CURRENT,

5A/div

1.198

1.196

1.194

1.192

1.190

8

9 10 11 12 13 14

VIN (V)

VL LOAD REGULATION

5.05

5.04

5.03

5.02

EN1 = EN2 = VL

5.01

5.00

4.99

4.98

4.97

EN1 = EN2 = GND

4.96

4.95

0

20

40

60

80 100

LOAD CURRENT (mA)

REFERENCE VOLTAGE

LOAD REGULATION

1.251

EN1 = EN2 = VL

1.250

1.249

1.248

1.247

1.246 EN1 = EN2 = GND

1.245

0

50

100

150

200

LOAD CURRENT (µA)

POSITIVE CHARGE-PUMP REGULATOR

NORMALIZED LINE REGULATION

0.05

0.02

-0.01

ISRC = 0A

-0.04

ISRC = 25mA

-0.07

-0.10

10 11 12 13 14 15 16 17 18

VIN (V)

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