MAX14521E_15 Datasheet, PDF (5/21 Pages) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

MAX14521E
Quad, High-Voltage EL Lamp Driver
with I²C Interface
SDA
tLOW
tSU, DAT
tHD, DAT
tSU, STA
tHD, STA
tBUF
tSU, STO
SCL
tHD, STA
START
CONDITION
tHIGH
tR
tF
REPEATED
START CONDITION
STOP
START
CONDITION CONDITION
Figure 1. I²C Timing Specifications
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. 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
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)
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
2
1.5
1
0.5
TOTAL INPUT CURRENT
vs. BOOST CONVERTER FREQUENCY
80
V_FI = 300V_P-P
V_FI = 200V_P-P
POINT WHERE SET
V_EL DECREASES AS
60
FREQUENCY INCREASES
40
20
0
400 600 800 1000 1200 1400 1600
BOOST CONVERTER FREQUENCY (kHz)
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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