NTE1503 データシートの表示（PDF） - NTE Electronics

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NTE1503

Integrated Circuit 5–Step LED Driver Circuit for Logarithmic Response

NTE Electronics 

NTE1503

Integrated Circuit

5–Step LED Driver Circuit

for Logarithmic Response

Description:

The NTE1503 is an integrated circuit in a 9–Lead SIP type package designed for driving 5–LED bar

graphs or dot displays so that the LEDs may light logarithmically (dB) for input signal. Brightness of

the LEDs can be controlled by using the output current adjustment pin provided.

Features:

D 5–LED Bar Graph or Dot Display Drive

D Logarithmic Response with Respect to Input

D Brightness Externally Adjustable

D High Output Current, Suitable for Green LED Drive

D Lamp ON/OFF Hysteresis, No Flickering by Noise

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to +18V

Circuit Voltage, V8–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to +16V

Load Current Set Input Voltage, V7–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +16V

Output Voltage (Note 1), VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to +16V

Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18mA

Load Current Set Input Current, I7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.25mA

Output Current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA

Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550mW

Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C

Storage Temperatuere Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C

Note 1. Output Pin1, Pin2, Pin3, Pin4, and Pin6.

Electrical Characteristics: (TA = +25°C, VCC = 16V unless otherwise specified)

Parameter

Symbol

Test Conditions

Min Typ Max Unit

Input Voltage (LED ON)

LED 1

VI(ON)1

–

– 1.12 V

LED 2

VI(ON)2

–

– 1.86 V

LED 3

LED 4

LED 5

VI(ON)3

VI(ON)4

VI(ON)5

–

– 3.10 V

–

– 5.18 V

–

– 8.66 V

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