CM9321 Datasheet, PDF (3/11 Pages) California Micro Devices Corp – Asymmetrical High Efficiency Three Channel Boost LED/OLED Driver

Specifications (cont’d)
PRELIMINARY
CM9321
ELECTRICAL OPERATING CHARACTERISTICS ^{(SEE NOTE 1)}
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
V_IN = 3.6V; C_IN = 10μF, C_OUT = 1μF, C_OLED = 1μF, L₁ = 4.7μH, interleave mode, T_A = 25°C (unless otherwise specified)
V_IN
Input Voltage Range
2.7
6.0
V
I_Q
Quiescent Current
I_LED < 0.6mA (each channel), non-
switching
1.2
2.0
mA
V_UVLO
Undervoltage Lockout
V_IN Rising
2.0
2.2
2.4
V
V_OVP
Output Overvoltage Protec- V_OUT Rising
tion
19.0
19.5
20.0
V
I_SD
Shutdown Current
V_EN = 0V
10
15
μA
V_EN
Device Enable Threshold Device ON (by default)
1.0
Device OFF
V
0.2
V
Channel 1 (WLED)
I_LED1
LED Current (Note 1)
V_IN = 3.0V to 6.0V, R_SET1(kΩ)
4 WLED
2
----4---5---0-----
35
mA
R_SET1
Number of WLEDs (Note 2) V_IN = 2.7V to 6.0V
1
5
V_LED1
Voltage on LED1 Pin
Standard load (Note 3)
0.80
V
Channel 2 (OLED)
V_OLED
OLED Voltage (Note 4)
V_IN = 3.0V to 6.0V
8
20 × V_VSET2
18
V
I_OLED
OLED Current Range
V_IN = 2.7V to 6.0V
2
30
mA
ΔV_OLED / V_OLED ^VOLED ^Regulation
V_IN = 3.0V to 6.0V,
I_OLED = 5mA to 20mA
5
%
V_OLEDacc
O_LED Voltage Accuracy
1% divider resistors
3
%
V_REF
Reference Voltage
T_A = 25°C to 85°C
1.180
1.220
1.260 V
I_REF
V_REF Divider Current
(Recommended)
10
20
50
μA
Channel 3 (WLED)
I_LED3
LED Current (Note 1)
V_IN = 3.0V to 6.0V, R_SET1(kΩ)
4 WLED
2
----4---5---0-----
30
mA
R_SET1
Number of WLEDs (Note 2) V_IN = 2.7V to 6.0V
1
5
V_LED3
Voltage on LED3 Pin
Standard load (Note 3)
0.80
V
Boost Circuit (Note 3)
ΔI_LED / I_LED ⋅ ΔV_IN Line Regulation
V_IN = 3.0V to 6.0V Each Channel
1
%/V
I_OUT
Boost Output Current
V_IN = 3.0V to 6.0V
140
mA
V_OUT
Boost Output Voltage
Standard Load (Note 3)
V_IN
20
V
V_OUTR
Output Voltage Ripple
Standard Load (Note 3)
50
mVpp
D
Duty Cycle Range
V_IN = 2.7V to 6.0V,
5
I_LED = 2mA to I_{LED MAX}
95
%
R_DSON
MOSFET ON Resistance I_SW = 0.8A, V_GS = 15V
300
500 mΩ
© 2006 California Micro Devices Corp. All rights reserved.
04/26/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: [phone] l Fax: [phone] l www.cmd.com
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