MAX14521E Datasheet, PDF (7/20 Pages) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

Quad, High-Voltage EL Lamp Driver
with I²C Interface
Typical Operating Characteristics (continued)
(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.)
RAMP TIME vs. CODE
2000
1500
1000
NORMALIZED BRIGHTNESS
vs. SUPPLY VOLTAGE
2
V_FI = 200V_P-P
1.5
1
BOOST CONVERTER MAGNITUDE vs.
FREQUENCY (SPREAD SPECTRUM DISABLED)
0
RBW = 100Hz
f_SW = 1.6MHz
-20 ^VEL ^{= 300V}P-P
SS[1:0] = 00
-40
-60
500
0.5
-80
0
0
2
4
6
8
RT_ _[2:0] CODE (DECIMAL VALUE)
BOOST CONVERTER MAGNITUDE vs.
FREQUENCY (SPREAD SPECTRUM ENABLED)
0
RBW = 100Hz
f_SW = 1.6MHz
-20 ^VEL ^{= 300V}P-P
SS[1:0] = 10
-40
-60
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
SCOPE SHOT WITH SL[1:0] = 00
MAX14521E toc20
-100
0
10
100
FREQUENCY (MHz)
SCOPE SHOT WITH SL[1:0] = 01
MAX14521E toc21
Math Freq
201.7 Hz
Math Pk-Pk
205 V
Math Freq
201.3 Hz
Math Pk-Pk
208 V
-80
-100
0
10
100
FREQUENCY (MHz)
SCOPE SHOT WITH SL[1:0] = 10
MAX14521E toc22
SCOPE SHOT WITH SL[1:0] = 11
MAX14521E toc23
RAMPING TIME
MAX14521E toc24
Math Freq
201.8 Hz
Math Pk-Pk
208 V
Math Freq
202.0 Hz
Math Pk-Pk
208 V
Math Pk-Pk
298 V
V_EL
50V/div
1s/div
_______________________________________________________________________________________ 7