ORISTER RS9360AQNP

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RS9360A/B
Charge-Pump White LED Driver
Description
The RS9360 is a compact, high efficient and high integration charge pump with current matched white LED driver. It can support
1 to 4 White LED's and optimized for Li-Ion battery applications. The four WLEDs current are matched for consistent brightness.
User can control WLED on/off via three programming bits. The every WLED channel can support up to 30mA current.
Features
• With Current Source
• Drives Up to Four LEDs
• Soft Start Function & Short Circuit Protection
• High Efficiency: Over 90%
• 250KHz/1MHz Fixed Frequecny CSC.
• Three Charge-pump Mode: X1,X1.5,X2
• QFN-16L4X4 Pb-Free Packaging
• Compatible RT9360& SC604 & MPS1519 & AAT3140 & MAX1910 & FAN5607 & LM2794 & CAT3604
Applications
• Cellular Phones & White Photo Flash for DSC
• Color (RGB) Lightng
• PDAs, Hand-held Computers GPS Receivers
• White LED Backlighting
Pin Connections
DS-RS9360-01 Aug, 2006
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Pin Descriptions
Pin Number
Pin Name
1
EN
2
3
4
CTRL0
CTRL1
CTRL2
5
ISET
6
7
8
9
10
11
12
13 to 16
Exp. Pad
VOUT
VIN
C1P
C1N
C2N
C2P
GND
LED1 to 4
GND
Pin Function
Chip Enable (Active High). Note that this pin is high impedance. There should be a
pull low 100kΩ resistor connected to GND when the control signal is floating.
Output Control Bit 0. (See Table 1)
Output Control Bit 1. (See Table 1)
Output Control Bit 2. (See Table 1)
LED current is set by the value of the resistor RSET connected from the ISET pin to
ground. Do not short the ISET pin. VISET is typically 1.1V.
Output Voltage Source for connection to the LED anodes.
Power Input Voltage
Positive Terminal of Bucket Capacitor 1
Negative Terminal of Bucket Capacitor 1
Negative Terminal of Bucket Capacitor 2
Positive Terminal of Bucket Capacitor 2
Ground.
Current Sink for LED. (If not in use, pin should be connected to VOUT)
Exposed pad should be soldered to PCB board and connected to GND.
Block Diagram
DS-RS9360-01 Aug, 2006
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Typical Application Circuit
Fig.1 For 4-WLEDs Application Circuit
Fig.2 For 3-WLEDs Application Circuit
Fig.3 For 2-WLEDs Application Circuit
DS-RS9360-01 Aug, 2006
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Absolute Maximum Rating
Parameter
Input Voltage
Output Voltage
Symbol
Value
Unit
VIN
-0.3~6
V
VOUT
-0.3~6
V
Power Dissipation ( QFN-16L 4X4 ) @ 25 oC
PD
2.5
W
Maximum Junction Temperature
TJ
125
o
C
260
o
C
-40 to + 85
o
C
-40 to + 85
2000
o
Lead Temperature
Operating Temperature Range
Storage Temperature Range
HBM ESD
T-LEAD
TOPR
TSTG
ESD
C
V
Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage.
These values must therefore not be exceeded under any condition.
Operations
The RS9360 is a high efficiency charge pump white LED driver. It provides 4 channels low drop-out voltage current source to
regulated 4 white LEDs current. For high efficiency, the RS9360 implements x1/x1.5/x2 mode charge pump. An external RSET is
used to set the current of white LED. RS9360 has a input current regulation to reduce the input ripple.
Soft Start
The RS9360 includes a soft start circuit to limit the inrush current at power on and mode switching. Soft start circuit holds the input
current level long enough for output capacitor COUT reaching a desired voltage level. When the soft start off, the RS9360 won’ t
sink spike current from VIN.
Mode Decision
The RS9360 uses a smart mode decision method to select the working mode for maximum efficiency. Mode decision circuit
senses the output and LED voltage for up/down selection.
Dimming Control
CTRL0, CTRL1 and CTRL2 are used to control the onoff of White LED. When a external PWM signal is connected to the control
pin, brightness of white LED is adjusted by the duty cycle.
LED Current Setting
The current of white LED connected to RS9360 can be set by RSET. Every current flows through the white LED is 440 times
greater than the current of RSET. The white LED can be estimated by following equation:
⎛V
I LED = 440 × ⎜⎜ ISET
⎝ RSET
⎞
⎟⎟
⎠
When VISET = 1.1V, and RSET is the resistance connected from ISET to GND.
Thermal Shutdown
The RS9360 provides a high current capability to drive 4 white LEDs. A thermal shutdown circuit is needed to protect the chip from
thermal damage. When the chip reaches the shutdown temperature 150℃, the thermal shutdown circuit turns off the chip to
prevent the thermal accumulation in the chip.
Overvoltage Protection
The RS9360 regulates the output voltage by controlling the input current. When the output voltage reaches the designated level,
the RS9360 reduces the input current. And then, the output voltage regulation also serves an over-voltage protection.
Short Circuit Protection
A current limiting circuit is also included in theRS9360 for short circuit protection. Whenever output source a dangerously high
current, the current limiting circuit takes over the output regulation circuit and reduces the output current at an acceptable level.
DS-RS9360-01 Aug, 2006
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Table 1
CTRL 2
0
0
0
0
1
1
1
1
Control Inputs
CTRL 1
0
0
1
1
0
0
1
1
CTRL 0
0
1
0
1
0
1
0
1
Output Status
LED 3
LED 2
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
OFF
OFF
LED 4
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
LED 1
ON
OFF
OFF
OFF
ON
ON
ON
OFF
Electrical Characteristics
(Ta=25°C, VIN =2.85-5.5V, C1=C2=1.0μF, ESR=0.03Ohms, unless otherwise noted.)
Parameter
Input Supply Voltage
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
Current into LEDs 1, 2, 3 and 4
Quiescent Current
RS9360A
RS9360B
RS9360A/B
ILED Accuracy (Note 5)
Current Matching (Note 6)
Symbol
VIN
VIN rising
ILED
IQ
ILED-ERR
ILED-LED-ERR
1x mode to 1.5x mode Transition
Voltage (VIN falling)
VTRANS1X
1.5x mode to 2x mode Transition
Voltage (VIN falling)
VTRANS1.5X
Oscillator Frequency
FOSC
Input Current Limit
ILIMIT
Output Over Voltage Protection
VOVP
DS-RS9360-01 Aug, 2006
Test Condition
RSET = 24kΩ
RSET = 91kΩ
2.7V < VIN < 5.5V
3.1V < VIN < 5.5V
FOSC=250KHz, EN = High, No Load
FOSC=1MHz, EN = High, No Load
VIN = 4.2V, EN = Low
2mA < ILED < 30mA
2mA < ILED < 30mA
VLED= 3.5V, IOUT=80mA
ILED1 = ILED2 = ILED3 = ILED4 =
20mA
VLED= 3.5V, IOUT= 80mA
ILED1 = ILED2 = ILED3 = ILED4 =
20mA
RS9360A
RS9360B
Short Circuit applied from VOUT to
GND
Open circuit at any LED that is
programmed to be in the on state
Min.
2.5
1.8
-18.5
4.5
2
2
---
Typ.
2.2
50
20
5
--2.5
2.5
Max.
5.5
2.4
-21.5
5.5
20
30
3.5
3.5
Unit
V
V
mV
mA
mA
mA
mA
mA
mA
----
1
2
1
10
7.5
5
μA
%
%
--
3.75
3.85
V
--
2.85
2.95
V
200
0.8
250
1.0
300
1.2
kHz
MHz
250
400
650
mA
--
5.5
6
V
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QFN-16L 4x4 Dimension
Ordering Information
Part Number
RS9360AQNP
RS9360BQNP
DS-RS9360-01 Aug, 2006
Package
QFN-16L 4x4
QFN-16L 4x4
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Soldering Methods for Orister’s Products
1. Storage environment: Temperature=10oC~35oC Humidity=65%±15%
2. Reflow soldering of surface-mount devices
Figure 1: Temperature profile
tP
Critical Zone
TL to TP
TP
Ramp-up
TL
tL
Temperature
Tsmax
Tsmin
tS
Preheat
25
Ramp-down
t 25oC to Peak
Time
Profile Feature
Sn-Pb Eutectic Assembly
Pb-Free Assembly
<3 C/sec
<3oC/sec
- Temperature Min (Tsmin)
100oC
150oC
- Temperature Max (Tsmax)
150oC
200oC
60~120 sec
60~180 sec
<3oC/sec
<3oC/sec
o
183 C
217oC
Average ramp-up rate (TL to TP)
o
Preheat
- Time (min to max) (ts)
Tsmax to TL
- Ramp-up Rate
Time maintained above:
- Temperature (TL)
- Time (tL)
60~150 sec
Peak Temperature (TP)
Time within 5oC of actual Peak
Temperature (tP)
Ramp-down Rate
Time 25oC to Peak Temperature
o
o
60~150 sec
240 C +0/-5 C
260oC +0/-5oC
10~30 sec
20~40 sec
<6oC/sec
<6oC/sec
<6 minutes
<8 minutes
Peak temperature
Dipping time
3. Flow (wave) soldering (solder dipping)
Products
Pb devices.
Pb-Free devices.
DS-RS9360-01 Aug, 2006
o
o
245 C ±5 C
5sec ±1sec
260oC +0/-5oC
5sec ±1sec
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Important Notice:
• All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of Orister Corporation.
• Orister Corporation reserves the right to make changes to its products without notice.
• Orister Corporation products are not warranted to be suitable for use in Life-Support Applications, or systems.
• Orister Corporation assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
DS-RS9360-01 Aug, 2006
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