MAX8930
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Inductor Selection
Smaller inductance values typically offer smaller physi-
cal size for a given series resistance or saturation cur-
rent. The inductor’s saturation current rating should be
greater than the peak switching current. Recommended
inductor values range from 10 F H to 100 F H (e.g., 22 F H,
VLF3010AT-220MR33-1, TDK).
Capacitor Selection
Small, ceramic surface-mount capacitors with X7R or
X5R temperature characteristics are recommended due
to their small size, low cost, low equivalent series resis-
tance (ESR), and low equivalent series inductance (ESL).
If nonceramic capacitors are used, it is important that
they have low ESR to reduce the output ripple voltage
and peak-to-peak load transient voltage.
this function is used in conjunction with a microproces-
sor ( F P), connect a pullup resistor between CHG and
the logic I/O voltage to indicate charge status to the F P.
I 2 C Interface
The slave address for MAX8930 is EC/Dh in write/read
mode.
SDA
SCL
CHG Charge-Indicator Output
CHG is an open-drain output that indicates charger sta-
tus and can be used with an LED. CHG goes low during
DATA LINE STABLE
DATA VALID
CHANGE OF
DATA ALLOWED
charging when the bit of CHG at 02h is 1. CHG goes
high impedance when the bit of CHG at 02h is 0. When
Table 8. Recommended Inductors
Figure 10. SDA and SCL Bit Transfer
DESIGNATION
L SW
VALUE (μH)
22
22
22
22
47
68
DCR ( I )
1.5
4.0
1.0
5.0
2.2
3.3
MANUFACTURER
TDK
Panasonic
Taiyo Yuden
Taiyo Yuden
Sumida
Taiyo Yuden
PART
VLF3010AT-220MR33-1
ELJPC220KF
LB2016-220
LEM2520-220
CMD4D11-47
LEMC3225-680
CURRENT (mA)
330
160
105
125
180
120
Table 9. Recommended Capacitors
DESIGNATION
C PV5
C OUT
VALUE (μF)
1
1
MANUFACTURER
TDK
Taiyo Yuden
PART
C2012X5R0J105M
TMK316BJ105KL
DESCRIPTION
1 F F Q 20%, 6.3V X5R ceramic capacitor
1 F F Q 20%, 25V X7R ceramic capacitor
Table 10. Slave Address
A7
1
A6
1
A5
1
A4
0
A3
1
A2
1
A1
0
R/W
1/0
32
Maxim Integrated
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