參數(shù)資料
型號(hào)： AAT3169
廠商： Advanced Analogic Technologies, Inc.
英文描述： High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
中文描述： 高效率1x/1.5x/2x電荷泵白光LED應(yīng)用
文件頁(yè)數(shù)： 10/14頁(yè)
文件大小： 434K
代理商： AAT3169
AAT3169
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
10
3169.2006.04.1.0
The maximum current level is determined by the
value set in Register 3, the Max Current register.
Three scales are available for high operating cur-
rents with maximum current levels of 30mA, 20mA,
or 15mA. Each scale maintains approximately
1.8dB steps between settings. A separate mode is
available for ultra-low LED current operation.
When the Max Current register (Register 3) is set
to the Low Current setting, the Low Current regis-
ter (Register 4) must be programmed. The two
most significant bits of the Low Current register
control whether or not a given bank of current sinks
is enabled. The least two significant bits of the Low
Current register sets the current level for both
banks. For low current settings, the charge pump
may be enabled if required by the battery voltage
and LED forward voltage conditions, and 1X mode
quiescent current is approximately 130μA for multi-
ple channels or 65μA for Channel 6 operation only.
Both banks of current sinks must be in the same
high or low current mode of operation.
When EN/SET is held low for an amount of time
greater than T
OFF
, the AAT3169 enters shutdown
mode and draws less than 1μA from V
IN
. Data and
Address registers are reset to 0 during shutdown.
AS
2
Cwire Serial Interface Addressing
Low Current Register (Address 4)
Auto-Disable Feature
AAT3169 is equipped with an auto-disable feature
for each LED channel. After the IC is enabled and
started up, a test current of 120μA (typical) is
forced through each sink channel. The channel will
be disabled if the voltage of that particular SINK pin
does not drop to certain threshold. This feature is
very convenient for disabling an unused channel or
during an LED fail-short event.
Thermal Protection
The AAT3169 has built-in thermal protection circuit
that will shut down the charge pump if the die tem-
perature rises above the thermal limit, as is the
case during a short circuit of the V
OUT
pin.
Main Low
Current On
Sub Low
Current On
Data
Current
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Yes
Yes
Yes
Yes
No
No
No
No
Yes
Yes
Yes
Yes
115μA
175μA
280μA
400μA
115μA
175μA
280μA
400μA
115μA
175μA
280μA
400μA
Data
Max Current
1
2
3
4
20mA
30mA
15mA
Low Current
(see Low Current Register for values)
EN/SET
Rising Edges
Data Register
AAT3169
Address
0
1
2
3
4
17
18
19
20
21
1&2: D1~D6 Current
1: D1~D5 Current
2: D6 Current
3: Max Current
4: Low Current
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AAT3169_08 制造商:ANALOGICTECH 制造商全稱(chēng):Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
AAT3169IFO-T1 制造商:Skyworks Solutions Inc 功能描述:Voltage Regulators - Switching Regulators 1X/1.5X/2X Charge Pump For WLED Apps 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC
AAT3169ISN-T1 制造商:Skyworks Solutions Inc 功能描述:LED Lighting Drivers High Eff 1x/1.5x/2x Mode w/ PWM Control
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