CM9320 Datasheet, PDF (3/10 Pages) California Micro Devices Corp – Asymmetrical High Efficiency Two Channel Boost LED Driver

Specifications (cont’d)
PRELIMINARY
CM9320
ELECTRICAL OPERATING CHARACTERISTICS ^{(SEE NOTE 1)}
SYMBOL PARAMETER
CONDITIONS
MIN TYP
V_IN = 3.6V; C_IN = 10μF, C_OUT = 1μF, L₁ = 4.7μH, interleave mode, T_A = 25°C (unless otherwise specified)
V_IN
Input Voltage Range
2.7
I_Q
Quiescent Current
I_LED < 0.6mA (each channel), non-
1.2
switching
V_UVLO
Undervoltage Lockout
V_IN Rising
2.0 2.2
V_OVP
Output Overvoltage Protection V_OUT Rising
19.0 19.5
I_SD
Shutdown Current
V_EN = 0V
10
V_EN
Device Enable Threshold
Device ON (by default)
1.0
Device OFF
Channel 1
I_LED1
LED Current (Note 1)
V_IN = 3.0V to 6.0V, R_SET1(kΩ)
4 WLED
2
----4---5---0-----
R_SET1
Number of LEDs (Note 2)
V_IN = 2.7V to 6.0V
1
V_LED1
Voltage on LED1 Pin
Standard load (Note 3)
0.80
Channel 2
I_LED2
LED Current (Note 1)
V_IN = 3.0V to 6.0V, R_SET2(kΩ)
4 WLED
2
----4---5---0-----
R_SET2
Number of LEDs (Note 2)
V_IN = 2.7V to 6.0V
1
V_LED2
Voltage on LED2 Pin
Standard load (Note 3)
0.80
Boost Circuit (Note 3)
ΔI_LED / I_LED ⋅ ΔV_IN Line Regulation
V_IN = 3.0V to 6.0V Each Channel
1
I_OUT
Boost Output Current
V_IN = 3.0V to 6.0V
80
V_OUT
Boost Output Voltage
I_{LED 1,2} = 2mA to I_{LED MAX}
V_IN
D
Duty Cycle Range
V_IN = 2.7V to 6.0V,
5
I_{LED 1,2} = 2mA to I_{LED MAX}
V_OUTR
Output Voltage Ripple
Standard Load (Note 3)
50
R_DSON
MOSFET ON Resistance
I_SW = 0.8A, V_GS = 15V
300
Eff
Efficiency
Standard Load (Note 3)
85
I_SW
Switch Peak Current
Standard Load (Note 3)
0.5
P_IN
Input Power
I_{LED 1,2} = 20mA, 4WLED+1W
835
Control
I_{LED acc}
Channel Current Matching
1% R_SET Accuracy, Each Channel
3
(Note 4)
I_LEDR
LED Current Ripple
Standard Load (Note 3)
0.2
I_LEDNL
No-Load Mode (Note 5)
All Channels
0
fs
Switching Frequency
V_IN = 2.7V to 6.0V
0.8 1.0
MAX
6.0
2.0
2.4
20.0
15
0.2
35
5
30
5
20
95
500
0.6
1.2
UNITS
V
mA
V
V
μA
V
V
mA
V
mA
V
%/V
mA
V
%
mVpp
mΩ
%
A
mW
%
mApp
mA
MHz
© 2006 California Micro Devices Corp. All rights reserved.
05/08/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: [phone] l Fax: [phone] l www.cmd.com
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