MAX14521E Datasheet, PDF (5/20 Pages) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

Quad, High-Voltage EL Lamp Driver
with I²C Interface
SDA
t_{SU, DAT}
t_LOW
t_{HD, DAT}
t_{SU, STA}
t_{HD, STA}
t_BUF
t_{SU, STO}
SCL
t_{HD, STA}
START
CONDITION
t_HIGH
t_R
t_F
Figure 1. I²C Timing Specifications
REPEATED
START CONDITION
STOP
START
CONDITION CONDITION
Typical Operating Characteristics
(V_DD = 3.7V, total C_LAMP = 10nF, C_CS = 3.3nF, L_X = 2.3µH/115µH, 1:7 ratio, (I_SAT = 0.7A, R_S = 1Ω), T_A = +25°C, sine-wave output,
f_SW = 800kHz, f_EL = 200Hz, unless otherwise noted.)
TOTAL INPUT CURRENT
vs. SUPPLY VOLTAGE
60
V_FI = 300V_P-P
50
V_FI = 200V_P-P
40
30
20
10
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
TOTAL INPUT CURRENT
vs. TEMPERATURE
60
56 VFI = 300VP-P
52
48
44
40
36
32
28
24
20
16
12
8
4
0
-40 -15 10
35
60
85
TEMPERATURE (°C)
TOTAL INPUT CURRENT
vs. BOOST CONVERTER FREQUENCY
80
V_FI = 300V_P-P
V_FI = 200V_P-P
60
POINT WHERE SET
V_EL DECREASES AS
FREQUENCY INCREASES
40
20
0
400 600 800 1000 1200 1400 1600
BOOST CONVERTER FREQUENCY (kHz)
TOTAL INPUT CURRENT vs. LOAD
200
V_EL = 250V_P-P, f_SW = 800kHz,
UNLESS OTHERWISE NOTED
160
V_DD = 5V
f_SW = 700kHz
V_DD = 3.3V
120
f_SW = 400kHz
V_EL = 200V_P-P
80
40
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
2
1.5
1
0.5
SHUTDOWN CURRENT vs. TEMPERATURE
100
10
1
0
0
20
40
60
80
TOTAL COMBINED LOAD (nF)
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
0.1
-40 -15
10
35
60
85
TEMPERATURE (°C)
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