HV858K7-G Supertex, HV858K7-G Datasheet - Page 3

• Manufacturer Part Number: HV858K7-G
• Description: Display Drivers High Voltage Triple EL Lamp
• Manufacturer: Supertex

Specifications of HV858K7-G

• Mounting Style: SMD/SMT
• Package / Case: DFN-10
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Logic Input Conditions
The serial data input consists of a 10-bit string, 3-bit of
brightness control for each lamp and one bit(10
optionally control the power converter. The power converter
runs if any of the EL lamps has a non-zero brightness value
or if the PWR_ON bit is high while the other 9 bits are low.
Electrical Characteristics
Note:
R
V
Sym
V
V
I
D
I
LOGIC
V
V
f
1.
DS(ON)
f
I
I
DDQ
t
LAMP
f
f
HIGH
I
CLK
SW
LOW
t
1. SDI may be H or L if SCK is H.
2. SCK may be H or L if SDI is H.
3. While inputting serial data to the shift register, SDI
4. The previous 10 bits of serial input will be latched
DD
CS
MAX
SU
EL
EL
IN
CS
CS
H
Code refers to the 3-bit Brightness Control Code for the respective EL Lamp.
can change value only when SCK is L.
when SDI makes L to H transition while SCK is H.
Parameter
On-resistance of switching
transistor
Output regulation voltage
Differential lamp voltage
V
V
Quiescent V
disabled
Inductor switching frequency
EL Lamp frequency
Logic pin input low level
Logic pin input high level
Logic pin input current
Inductor current
Output regulation voltage
Lamp frequency
Maximum PWM switch duty cycle
SCK speed
SDI setup time before SCK rises
SDI hold time before SCK rises
DD
CS
Supertex inc.
supply current
supply current
DD
current when
(unless otherwise specified V
1235 Bordeaux Drive, Sunnyvale, CA 94089
0.8V
108.8
Min
170
425
-0.5
-0.1
85
10
80
30
30
-
-
-
-
-
-
-
-
-
th
DD
bit) to
82.5
Typ
DD
190
128
500
500
V
4.0
95
50
56
88
0
0
-
-
-
-
-
-
-
DD
= 2.6 - 5.5V, T
3
Logic Input Diagram
The EL Lamp brightness control is a 3-bit binary number
stored in a latch, which is provided by a serial to parallel
conversion shift register.
V
0.2V
147.2
DD
2000
Max
0.25
0.70
1. If all the 3 bits for a designated EL lamp are L, the
2. If any of the 3 bits for a designated EL lamp is H:
105
210
100
500
575
6.0
0.1
1.0
70
94
+0.5
-
-
-
-
DD
differential voltage across that lamp will be zero.
A
= 25°C)
a. The 3-bit value sets the average number
b. The EL lamp brightness is linearly
MHz
Tel: [phone]
Unit
kHz
mA
mA
µA
nA
Hz
µA
Hz
ns
ns
%
Ω
V
V
V
V
V
of cycles for which the EL lamp voltage is
non-zero.
proportional to the binary lamp control
code.
Conditions
V
S1...S9 = 0, V
V
V
PWR_ON = 1
V
PWR_ON = 1
V
V
and SDI can be tied to V
V
and SDI can be tied to V
See Fig. 1
For all codes except code
---
---
0 < V
See Fig 1. V
total lamp size = 3.0in
10-bit SDI serial code = 1111111111
V
---
---
---
DD
COM
DD
DD
CS
DD
DD
CS
= 75V, no load
= 1.73 - 3.30V, V
= 3.40 - 6.50V, V
= 20V, R
= 1.73 - 6.5V, I = 100mA
= 1.73 - 3.30V, S1...S9 = 0, SCK
= 3.40 - 6.50V, S1...S9 = 0, SCK
to any EL, no load, code
DD
< 7.0V
www.supertex.com
LOAD
DD
DD
= V
= 1.73 - 6.5V, no load
= 20Ω
IN
CS
CS
= 3V,
2
= 20V, no load,
= 20V, no load,
(1.0in
DD
DD
1
or GND
or GND
= 000
HV858
2
1
each)
= 111