Rainbow-electronics MAX1545 Bedienungsanleitung PDF herunterladen (Seite 6)

MAX1519/MAX1545

Dual-Phase, Quick-PWM Controllers for

Programmable CPU Core Power Supplies

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V+ = 15V, V

= V

SHDN

= V

TON

= V

SKIP

= V

CODE

= 5V, V

= V

CMP

= V

CMN

= V

CSP

= V

CSN

= 1.3V, OFS = SUS = GNDS = D0–D4 = GND; T

= 0°C to +85°C, unless otherwise specified. Typical values are at T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

D0–D4 Input Current D0–D4 -2 +2 µA

CODE Input High Voltage 2.4 V

CODE Input Low Voltage 0.8 V

CODE Input Current -1 +1 µA

High

0.4

Open 3.15 3.85

REF 1.65 2.35

Four-Level Input Logic Levels TON, S0–S1

Low 0.4

Four-Level Input Current TON, S0–S1 forced to GND or V

-3 +3 µA

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V+ = 15V, V

= V

SHDN

= V

TON

= V

SKIP

= V

CODE

= 5V, V

= V

CMP

= V

CMN

= V

CSP

= V

CSN

= 1.3V, OFS = SUS = GNDS = D0–D4 = GND; T

= -40°C to +100°C, unless otherwise specified.) (Note 5)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

PWM CONTROLLER

Battery voltage, V+ 4 28

Input Voltage Range

, V

4.5 5.5

DAC codes ≥ 1V -13 +13

DC Output Voltage Accuracy

(Note 2)

V+ = 4.5V to 28V,

includes load

regulation error

DAC codes from

0.60V to 1V

-20 +20

OFS Input Range 02V

∆V

OUT

/∆V

OFS;

∆V

OFS

= V

OFS,

OFS

= 0 to 1V

-0.131 -0.115

OFS Gain A

OFS

∆V

OUT

/∆V

OFS;

∆V

OFS

= V

OFS

- V

REF,

OFS

= 1V to 2V

-0.131 -0.115

V/V

GNDS Gain A

GNDS

∆V

OUT

/∆V

GNDS

0.94 1.01 V/V

1000kHz nominal, R

TIME

= 15kΩ 880 1120

500kHz nominal, R

TIME

= 30kΩ 450 550TIME Frequency Accuracy f

TIME

250kHz nominal, R

TIME

= 60kΩ 220 280

kHz

TON = GND

(550kHz)

150 210

TON = REF

(300kHz)

315 395

TON = open

(200kHz)

470 580

On-Time (Note 3) t

V+ = 12V,

= V

CCI

= 1.2V

TON = V

(100kHz)

910 1150

TON = GND 380

Minimum Off-Time (Note 3) t

OFF

(

MIN

)

TON = V

, open, or REF 490

1 2 3 4 5 6 7 8 9 10 11 ... 42 43

MAX1519/MAX1545 1

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