HV853K7-G Supertex, HV853K7-G Datasheet - Page 5

• Manufacturer Part Number: HV853K7-G
• Description: Display Drivers Hi-Voltage/Lo-Noise Inductorless
• Manufacturer: Supertex

Specifications of HV853K7-G

• Driver Type: EL Lamp Drivers
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: DFN-10
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EL Lamp Dimming Using PWM
EL lamp dimming can be achieved by applying a PWM signal to the ENABLE pin. This is done by pulse skipping the out-
put pulses. The PWM frequency should be kept below the EL frequency but above 50Hz to avoid flickering.
Figure 4: PWM Dimming Circuit
Pin Descriptions: 10-Lead DFN (K7) / 8-Lead MSOP (MG)
7,8
K7
10
1
2
3
4
5
6
9
Pin #
MG
1
2
3
4
5
6
7
8
-
Signal
CLKEN
CLKIN
Name
PWM
GND
VDD
REL
Pin
NC
EN
VB
VA
V
DD
+
-
GND
V
DD
Description
Input supply voltage pin.
An external resistor to VDD will set the EL lamp frequency. The EL frequency is inversely
proportional to the R
quency of 280Hz
When using an external clock to set the EL lamp frequency, the REL pin should be con-
nected to ground.
Enable input pin. Logic high will turn the device on. An external R-C circuit can be added for
a delayed turn off.
Logic input pin. An external logic clock applied to this pin can be used to set the EL lamp
frequency (see Figure 3). The EL lamp frequency is the external clock frequency divided by
128. This is useful for applications requiring the EL lamp to be synchronized to a system
clock. Connect to ground when not in use.
No connect.
Logic input pin. Logic high will cause the EL lamp frequency to be set by the CLKIN input.
Logic low will cause the EL lamp frequency to be set by the external R
IC ground pin.
EL lamp driver output pin. The EL lamp is connected across VA and VB terminals.
EL lamp driver output pin. The EL lamp is connected across VA and VB terminals.
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
C
DD
R
EL
EL
2
1
3
4
resistor value. A 1.5MΩ resistor would provide a nominal lamp fre-
VDD
REL
EN
CLKIN
HV853MG
5
f
CLKEN
EL
GND
= (1.5MΩ)(280Hz) / (R
VA
VB
8
7
6
5
●
Tel: [phone]
EL Lamp
EL
)
●
www.supertex.com
EL
resistor.
HV853