Document
Endicott Research Group, Inc.
2601 Wayne St., Endicott NY 13760 607-754-9187 Fax 607-754-9255 http://www.ergpower.com
MA262371
Six Tube DC to AC Inverter Package Configuration
.52 [13,2] J3
1 1
Specifications and Applications Information
07/20/00 Preliminary
.750 [19,05]
Powered by a regulated 12 volt DC source the MA262371 is specially designed to power the Sharp LQ196U1LG01 display.
J2
Product Features
6.03 [153,2] MAX
ü ü ü
Small Package Size, less than 17mm in height. High Efficiency Made in U.S.A.
5.700 [144,78]
1
.17 [4,2] .150 [3,8] Dia. (4x)
.350 [8,89] 1.450 [36,83]
J1
MA Package
PCB components shown for reference only. Actual product may differ from that shown.
Weight: 100 grams
Pinouts
NC NC NC Lamp Lamp Lamp AC com. J3-1 J3-3 J3-5 J3-7 J3-9 J3-11 J3-13 NC NC NC Lamp Lamp Lamp AC com.
Connectors
J1 Molex 22-23-2081 J2 Molex 22-23-2071 J3 Molex 22-23-2071
J1-1 J1-2 J1-3 J1-4 J1-5 J1-6 J1-7 J1-8
Vin Vin GND GND Control Disable PWMOut Hi-Bright
J2-1 J2-3 J2-5 J2-7 J2-9 J2-11 J2-13
PCB components shown for reference only. Actual product may differ from that shown.
The ERG MA262371 (MA Series) DC to AC inverter features onboard connectors and can be easily dimmed using an external pulse-width modulated control signal or using the onboard PWM with an external analog voltage. This unit is only 17mm in height and the four mounting holes makes installation very straight forward.
1.78 [45,2] MAX
MA262371
Absolute Maximum Ratings (Note 1)
Rating Input Voltage Disable Control Operating Temperature Storage Temperature Symbol Vi n VDisable VControl Ta Ts Value -0.3 to +15 -0.3 to Vin +0.3 -0.3 to Vin +0.3 0 to +85 -40 to +85 Units VDC VDC VDC
o o
C C
Recommended Operating Conditions
Rating Input Voltage Operating Temperature
(Note 2)
Symbol Vi n Ta
Value 10.8 to 13.2 0 to +50
Units VDC
o
C
Electrical Characteristics
Unless otherwise noted Vin = 12.00 Volts DC , Ta = 25 oC, Pin J1-8 "hi-bright" = float, and the unit has been running for 5 minutes.
Characteristic Inverter Input Current Input Ripple Current Operating Frequency Efficiency Output Voltage (no load) Output Current (per tube)
Hi-Brite open
(Note 3)
Symbol
Min
Typ
Max
Units
I in I rip Fo η Vstart I out Hi/O I out Hi/G
40 2000 -
2.5 150 45 86 6.0 7.75
2.8 50 -
ADC mA pk-pk KHz % V mArms mArms
Output Current (per tube)
Hi-Brite GND
Disable (pin J1-6) Turn-Off Threshold Turn-On Threshold
Vthoff Vthon
2.0
-
0.8 -
V V
(Note 1) Reliable and predictable operation of the device is not guaranteed with applied stresses at or beyond those listed in "Absolute Maximum Ratings. Operation at these limits may reduce device reliability and is therefore not recommended. Please refer to "Recommended Operating Conditions for reliable operation of the device. (Note 2) Reliable operation above 50oC is possible if airflow is provided. (Note 3) Provided data is not tested but guaranteed by design.
MA262371
Onboard PWM
Unless otherwise noted Vin = 12.00 Volts DC , Ta = 25 oC and unit has been running for 5 minutes.
Characteristic Frequency PWM Output High PWM Output Low Control Input Bias Current
Symbol
fpwm
Min 8.0 -
Typ 160 -
Max 0.8 10
Units HZ V V uA
Vpwmoh Vpwmol I cbias
Pin Descriptions
Vin GND Control Disable Hi-Bright Input voltage to the inverter. Both pins should be connected for optimum reliability and efficiency . Inverter ground. Both pins should be connected for optimum reliability and efficiency. Analog voltage input to the onboard pulse width modulator. Increasing this voltage increases the off time of the onboard PWM resulting in decreased brightness. Inverter disable. Pull this pin low to disable inverter operation. If this pin is left floating or driven high, the inverter is enabled. If the onboard PWM is utilized, connect this pin to PWMOUT. Grounding this pin increases the output current of the inverter. The increase in output current can yield an approximate 25% increase in the backlight brightness. Note that the output current with this pin grounded may exceed the lamp manufacturer's specifications, reducing overall backlight life. Output of the onboard PWM generator.
PWMOUT
Application information
The MA series of inverters is designed to power up to twelve cold cathode fluorescent tubes with combined power from ten watts to forty watts. An external disable control and an onboard pulse width modulator provide flexibility in allowing either analog or PWM methods for dimming. External shutdown or external PWM operation of the inverter is accomplished using the Disable pin. Pulling this pin low (below Vthoff) disables the inverter. Enabling the inverter is accomplished by floating this pin or pulling this pin high (above Vthon). If analog voltage dimming is required, the onboard PWM is enabled by connecting the PWMOut pin to the Disable pin. The analog voltage is applied to the Control pin. Figure 1 shows how to connect the inverter for onboard PWM operation. Graph 1 shows the relationship of .