CHB150 参数 Datasheet PDF下载

Application Note

Derating

The operating case temperature range of the CHB100/150 series is -40˚C to +100˚C. When operating the CHB100/150 series,

proper derating or cooling is needed .

Following is the derating curve of CHB100/150 without heat sink.

Remote ON/OFF Control

The CHB100/150 Series allows the user to switch the module on and off electronically with remote on/off feature. The

CHB100/150 Series are available with "positive logic" or "negative logic" (option).

Logic Table

ON/OFF (2)

Logic State

(Pin 2)

Logic Low -

Power Dissipated vs Ambient Temperature and Air Flow

35

Power Disspated, Pd (Watts)

30

200 ft./min. (1.0 m/s)

25

20

15

10

5

600 ft./min. (3.0 m/s)

0

0

10

20

30

40

50

60

70

80

90

100

700 ft./min. (3.5 m/s)

800 ft./min. (4.0 m/s)

Ambient Temperature, Ta(Deg. C)

TRIM (7)

300 ft./min. ( 1.5 m/s)

400 ft./min. (2.0 m/s)

500 ft./min. (2.5 m/s)

Natural Convection

20 ft./min. (0.1 m/s)

100 ft./min. (0.5 m/s)

-VIN (4)

HIGH SIGNAL HERE

DISABLE OUTPUT

Switch Closed

Logic High -

Switch Open

Module on

Module off

Module off

Module on

External Output Trimming

Output may optionally be externally trimmed

(±10%) with a fixed resistor or an external

trimpot as shown.

TRIM DOWN

TRIM (7)

10K ohms

TRIMPOT

+SENSE (8)

+SENSE (8)

TRIM UP

Forced Convection Power Derating with No Heat Sink

-SENSE (6)

-SENSE (6)

Where:

The power dissipation (Pd):

Pd = Pi - Po = Po (1-

)/

External Output

The thermal resistance are list below:

Chart of Thermal Resistance vs Air Flow:

AIR FLOW RATE

Natural Convection 20ft./min. (0.1m/s)

100 ft./min. (0.5m/s)

200 ft./min. (1.0m/s)

300 ft./min. (1.5m/s)

400 ft./min. (2.0m/s)

500 ft./min. (2.5m/s)

600 ft./min. (3.0m/s)

700 ft./min. (3.5m/s)

800 ft./min. (4.0m/s)

TYPICAL Rca

7.12

˚C

/W

6.21

˚C

/W

5.17

˚C

/W

4.29

˚C

/W

3.64

˚C

/W

2.96

˚C

/W

2.53

˚C

/W

2.37

˚C

/W

2.19

˚C

/W

Output Noise

The output noise is measured with 10µF tantalum capacitor and 1.0µF ceramic capacitor across output.

+Vout (9)

Ceramic

1.0µF

Resistor

Load

Solid Tantalum

10µF

-Vout (5)

To

Scope

The temperature rise (

T ):

T = Pd * Rca

Output Noise Test Circuit schematic

85

All Specifications Typical At Nominal Line, Full Load and 25˚C Unless Otherwise Noted.

86

CHB150

Negative Logic

Positive Logic