NTE1502 Datasheet, PDF (1/2 Pages) NTE Electronics – Integrated Circuit 5-Step LED Driver Circuit for Linear Response

NTE1502
Integrated Circuit
5–Step LED Driver Circuit
for Linear Response
Description:
The NTE1502 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 linearly 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 Linear 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: (T_A = +25°C unless otherwise specified)
Supply Voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to +18V
Circuit Voltage, V_8–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to +16V
Load Current Set Input Voltage, V_7–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +16V
Output Voltage (Note 1), V_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to +16V
Supply Current (Note 1), I_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18mA
Load Current Set Input Current (Note 2), I₇ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Output Current (Note 1), I_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA
Power Dissipation (T_A = +75°C ), P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550mW
Operating Ambient Temperature Range, T_opr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperatuere Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Note 1. Output Pin1, Pin2, Pin3, Pin4, and Pin6.
Note 2. I₇ which can be set I_O = 20mA is assumed to be the absolute rated value.
Electrical Characteristics: (T_A = +25°C, V_CC = 16V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Input Voltage (LED ON)
LED 1
V_I(ON)1
1.63 1.83 2.00 V
LED 2
V_I(ON)2
2.20 2.43 2.64 V
LED 3
LED 4
LED 5
V_I(ON)3
V_I(ON)4
V_I(ON)5
2.80 3.03 3.27 V
3.38 3.64 3.88 V
3.92 4.14 4.37 V