MAX8930 查看數據表（PDF） - Maxim Integrated
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MAX8930 Datasheet PDF : 52 Pages
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WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
CHG PIN CHARACTERISTICS
PARAMETER
Low-Level Voltage
Leakage Current
ICHG = 5mA
VCHG = 3.7V
CONDITIONS
TA = +25NC
TA = +85NC
MIN TYP MAX UNITS
0.05 0.2
V
0.1
1
FA
1
Note 1: Limits are 100% production tested at TA = +25NC. Limits over the operating temperature range are guaranteed by design.
Note 2: 0.1mA LED load current is not included.
Note 3: Guaranteed by design. Not production tested.
Note 4: LED current matching is defined as: (IMAX - IMAX)/25.6mA. Matching is for LEDs within the RGB group (RLED, GLED,
BLED) or the white LED group (WLED1–WLED8).
Note 5: Dropout voltage is defined as the LED_ to AGND voltage at which current into LED_ drops 10% from the value at VLED_ =
0.5V at 1x mode.
Note 6: VKEY = 0V when pulling low, leakage current from PV3. VKEY = 3.7V when pulling high, leakage current is to GND.
Typical Operating Characteristics
(VPV_ = VEN = 3.7V, circuit of Figure 1, TA = +25°C, unless otherwise noted.)
WLED EFFICIENCY vs. INPUT VOTLAGE,
6 MATCHED WLEDS
100
ILED_ = 1.6mA, 6.4mA, 16mA, 20.8mA
90
80
70
60
50
40
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
EFFICIENCY vs. Li+ BATTERY VOLTAGE
DRIVING 6 MISMATCHED LEDs
100
90
6.4mA/LED
1.6mA/LED
80
70
60
20.8mA/LED 16mA/LED
50
40
4.2 3.9 3.8 3.7 3.6 3.5 3.4 3.0
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
WLED EFFICIENCY vs. INPUT VOTLAGE,
6 MISMATCHED WLEDS
100
ILED_ = 1.6mA, 6.4mA, 16mA, 20.8mA
90
80
70
60
50
40
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
0.0265
0.0264
0.0263
0.0262
0.0261
0.0260
0.0259
0.0258
0.0257
0.0256
0.0255
0.0254
2.5
WLED CURRENT MATCHING
vs. INPUT VOTLAGE
ILED_ = 25.6mA
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
EFFICIENCY vs. Li+ BATTERY VOLTAGE
DRIVING 6 MATCHED LEDs
100
90
16mA/LED
80
70
20.8mA/LED
60 1.6mA/LED
50
6.4mA/LED
40
4.2 3.9 3.8 3.7 3.6 3.5 3.4 3.0
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
WLED—CHARGE PUMP INACTIVE
MAX8930 toc06
VPV_ = 3.8V, ILED_ = 25.6mA
VC1P
0V
VC1N
0V
VC2P
0V
VC2N
0V
VNEG
0V
100ns/div
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