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RT9396 Schematic ( PDF Datasheet ) - Richtek

Teilenummer RT9396
Beschreibung I2C Interface PMIC
Hersteller Richtek
Logo Richtek Logo 




Gesamt 17 Seiten
RT9396 Datasheet, Funktion
RT9396
I2C Interface PMIC with 6-Channel WLED Driver and 4-LDO
General Description
The RT9396 is a power management IC (PMIC) for
backlighting and phone camera applications. The PMIC
contains a 6-Channel charge pump white LED driver and
four low dropout linear regulators.
The charge pump drives up to 6 white LEDs with regulated
constant current for uniform intensity. Each channel
(LED1 to LED6) supports up to 25mA of current. These
6-Channels can be also programmed as 4 plus 2-Channels
or 5 plus 1-Channel with different current setting for
auxiliary LED application. The RT9396 maintains highest
efficiency by utilizing a x1/ x1.5/ x2 fractional charge pump
and low dropout current regulators. An internal 6-bit DAC
is used for backlight brightness control. Users can easily
configure up to 64 steps of LED current via the I2C interface
control.
The RT9396 also comprises low noise, low dropout
regulators, which provide up to 200mA of current for each
of the four channels. The four LDOs deliver 3% output
accuracy and low dropout voltage of 200mV @ 200mA.
Users can easily configure LDO output voltage via the I2C
interface control. The LDOs also provide current limiting
and over temperature functions.
The RT9396 is available in a WQFN-24L 3x3 package.
Ordering Information
RT9396
Package Type
QW : WQFN-24L 3x3 (COL) (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Features
z Tri-Mode (x1/x1.5/x2) Charge Pump
z Maximum 25mA x 6-Channel LED Backlighting
Output Current
z Support Main/Sub (4+2/5+1) LED Function
z 64 Steps Programmable LED Current
z Support PWM Dimming Function
z Fade In/Out Via I2C Control
z 4 Low Dropout Regulators
z Maximum 200mA x 4-Channel LDO Output Current
z 16-Level LDO Output Voltage Setting
z I2C Programmable Independent LDO Channel
ON/OFF Control
z Over Temperature Protection
z Thin 24-Lead WQFN Package
z RoHS Compliant and Halogen Free
Applications
z Cellular Phones
z PDAs and Smart Phones
Pin Configurations
(TOP VIEW)
PGND
C2N
C1N
C1P
C2P
24 23 22 21 20 19 18
1 17
2 16
3 15
4 14
5 13
SCL
SDA
EN
PWM
CF
6 7 8 9 10 11 12
WQFN-24L 3x3 (COL)
DS9396-01 April 2011
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1






RT9396 Datasheet, Funktion
RT9396
Table 2. 64-Step WLED Current Setting
C5 C4 C3
C2
C1
C0
WLED
Current (mA)
00 0 0 0 0
0.39
C5 C4
C3
C2
C1
C0
WLED
Current (mA)
10 0 0 0 0
12.89
00 0 0 0 1
00 0 0 1 0
00 0 0 1 1
00 0 1 0 0
00 0 1 0 1
00 0 1 1 0
00 0 1 1 1
00 1 0 0 0
00 1 0 0 1
00 1 0 1 0
00 1 0 1 1
00 1 1 0 0
00 1 1 0 1
00 1 1 1 0
00 1 1 1 1
0.78
1.17
1.56
1.95
2.34
2.73
3.13
3.52
3.91
4.3
4.69
5.08
5.47
5.86
6.25
10 0 0 0 1
10 0 0 1 1
10 0 1 0 0
10 0 1 0 1
10 0 1 1 0
10 0 1 1 1
10 1 0 0 0
10 1 0 0 1
10 1 0 1 0
10 1 0 1 1
10 1 1 0 0
10 1 1 0 1
10 1 1 1 0
10 1 1 1 1
11 0 0 0 0
13.28
14.06
14.45
14.84
15.23
15.63
16.02
16.41
16.8
17.19
17.58
17.97
18.36
18.75
19.14
01 0 0 0 0
01 0 0 0 1
01 0 0 1 0
01 0 0 1 1
01 0 1 0 0
01 0 1 0 1
01 0 1 1 0
6.64
7.03
7.42
7.81
8.2
8.59
8.98
11 0 0 0 1
11 0 0 1 0
11 0 0 1 1
11 0 1 0 0
11 0 1 0 1
11 0 1 1 0
11 0 1 1 1
19.53
19.92
20.31
20.7
21.09
21.48
21.88
01 0 1 1 1
01 1 0 0 0
01 1 0 0 1
01 1 0 1 0
01 1 0 1 1
01 1 1 0 0
01 1 1 0 1
01 1 1 1 0
01 1 1 1 1
9.38
9.77
10.16
10.55
10.94
11.33
11.72
12.11
12.5
11 1 0 0 0
11 1 0 0 1
11 1 0 1 0
11 1 0 1 1
11 1 1 0 0
11 1 1 0 1
11 1 1 1 0
11 1 1 1 1
22.27
22.66
23.05
23.44
23.83
24.22
24.61
25
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DS9396-01 April 2011

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RT9396 pdf, datenblatt
RT9396
VLDO1
(100mV/Div)
ILDO1
(200mA/Div)
VLDO2
(100mV/Div)
ILDO2
(200mA/Div)
Load Transient Response
VLDO3
(100mV/Div)
ILDO3
(200mA/Div)
VIN = 4.3V, VLDO1 = VLDO2 = 3.3V
Time (10μs/Div)
VLDO4
(100mV/Div)
ILDO4
(200mA/Div)
Load Transient Response
VIN = 4.3V, VLDO3 = VLDO4 = 3.3V
Time (10μs/Div)
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
10
PSRR
(0.2mV/Div)
VIN = 4.3V, VLDO = 3.3V, ILOAD = 200mA
100 1000 10000 100000 1000000
Frequency (Hz)
Noise
Noise
VIN = 4.3V, VLDO = 3.3V, No Load
Time (50ms/Div)
(0.2mV/Div)
VIN = 4.3V, VLDO = 3.3V, ILOAD = 50mA
Time (50ms/Div)
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