MAX14521E Datasheet, PDF (3/20 Pages) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

Quad, High-Voltage EL Lamp Driver
with I²C Interface
ELECTRICAL CHARACTERISTICS (continued)
(V_DD = +2.7V to +5.5V, total C_LAMP = 10nF, C_CS = 3.3nF, tapped inductor = 2.3µH/115µH, 1:7 ratio (I_SAT = 0.7A, R_S = 1Ω),
T_A = -40°C to +85°C, unless otherwise noted. Typical values are at T_A = +25°C and V_DD = 3.7V.) (Note 2)
PARAMETER
EL_ High-Side Switch Off-
Leakage
SYMBOL
I_{LKGHS_EL_}
CONDITIONS
MIN TYP MAX UNITS
-1
+1
µA
EL_ Low-Side Switch Off-
Leakage
I_{LKGLS_EL_}
-1
+1
µA
COM High-Side Switch Off-
Leakage
I_{LKGHS_COM}
-1
+1
µA
COM Low-Side Switch Off-
Leakage
I_{LKGLS_COM}
-1
+1
µA
EL Lamp Switching Frequency
BOOST CONVERTER
f_{EL_LR}
FEL[7:0] = 1000
0000; V_DD = 3.7V
T_A = +25°C
194
T_A = -40°C to +85°F 186
200
200
206
212
Hz
f_{EL_HR}
FEL[7:0] = 1011
1111; V_DD = 3.7V
T_A = +25°C
388
T_A = -40°C to +85°F 376
400
400
412
424
Peak Output Voltage
EL_ _[4:0] = 01000; V_DD = 3.7V
Vcs
EL_ _[4:0] = 10000; V_DD = 3.7V
EL_ _[4:0] = 11111; V_DD = 3.7V
FSW[4:0] = 10000
33
39
45
68
77
86
V
134
150
160
400
Tapped-Inductor Center
Switching Frequency
FSW[4:0] = 11111
f_SW
FSW[4:0] = 00000 (default)
800
kHz
800
FSW[4:0] = 01111
1600
Tapped-Inductor Switching
Frequency Spreading Factor
S_F
SS[1:0] = 01, 10, or 11
8
%
Tapped-Inductor Switching
Frequency Modulation Frequency
f_M
SS[1:0] = 11
Switch On-Resistance
LX Current
CS Input Current
CONTROL INPUT AUX
R_LX
I_SINK = 25mA, V_DD = 3.7V
I_LX
V_LX = 30V
I_CS
No load, V_CS = 150V
Input Range
Input Capacitance
CONTROL INPUT RB
AUX_RNG
AUX_CAP
Input Logic-Low Voltage
V_{IL_RB}
Input Logic-High Voltage
V_{IH_RB}
Input Hysteresis
I_{HYS_RB}
Input Leakage Current
I_{LKG_RB} V_RB = 5.5V or 0
Input Capacitance
C_IN
I²C INTERFACE LOGIC (SDA, SCL, A1, AND A0) (Figure 1)
Input Logic-Low Voltage
V_IL
Input Logic-High Voltage
V_IH
Input Hysteresis
I_HYS
f_SW/128
kHz
3
Ω
-1
+10
µA
27
µA
0
V_DD
V
10
pF
0.5
V
1.5
V
130
mV
-1
+1
µA
10
pF
0.5
V
1.5
V
130
mV
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