- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385493 > LP3936 (National Semiconductor Corporation) Lighting Management System for Six White LEDs and One RGB or FLASH LED PDF資料下載
參數(shù)資料
| 型號： | LP3936 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Lighting Management System for Six White LEDs and One RGB or FLASH LED |
| 中文描述： | 照明管理系統(tǒng)6個白光LED和一個RGB或閃光燈LED |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 520K |
| 代理商： | LP3936 |
Boost Output Voltage Control
User can control the boost output voltage by boost output 8-bit register.
Boost[7:0]
Register 0Dh
Binary
0000 0000
0000 0001
0000 0011
0000 0111
0000 1111
0001 1111
0011 1111
0111 1111
1111 1111
BOOST Output
Voltage
(typical)
Hex
00
01
03
07
0F
1F
3F
7F
FF
4.10
4.25
4.40
4.55 Default
4.70
4.85
5.00
5.15
5.30
Boost Output Voltage Control
20081418
Magnetic Boost DC/DC Converter Electrical Characteristics
Symbol
I
LOAD
Parameter
Conditions
Min
Typ
Max
Units
Load Current
3.0V
≤
V
IN
≤
4.5V
V
OUT
= 4.55V
1 mA
≤
I
LOAD
≤
225 mA
3.0V
≤
V
IN
≤
V (FB)0.5V
V
OUT
= 4.55V
1 mA
≤
I
LOAD
≤
250 mA
3.0V
<
V
IN
<
4.55V +
V
(SCHOTTKY)
1 mA
≤
I
LOAD
≤
250 mA
V
IN
>
4.55V + V
(SCHOTTKY)
V
DD1,2
= 3.6V, I
SW
= 0.5A
RT = 82 k
RT = 82 k
0
250
mA
V
OUT
Output Voltage Accuracy (FB Pin)
5
+5
%
Output Voltage (FB Pin)
4.55
V
V
IN
–V
(SCHOTTKY)
V
RDS
ON
f
PWF
Switch ON Resistance
PWM Mode Switching Frequency
Frequency Accuracy
0.4
1
±
3
0.5
MHz
6
10
+6
+10
%
t
STARTUP
Startup Time
I
CL_OUT
OUT Pin Current Limit
25
750
ms
V
DD
= 3.6V
600
400
1050
1200
mA
PFM/PWM Mode
User can change the Boost converters mode between PWM (Pulse Width Modulation) and PFM (Pulse Frequency Modulation).
The startup is done on PFM mode and then the device runs on PWM mode (as a default). User can set PFM mode by turning
“pfm_mode” register bit HIGH. PFM is recommended to use with light loads and PWM with high loads.
Boost Standby Mode
User can set boost converter to STANDBY mode by writing register bit EN_BOOST low. This mode can be useful when driving
LEDs directly from battery voltage. This may be possible if LED forward voltage is low, battery voltage is high and LED current
is low.
When EN_BOOST is written high, the converter starts for 10 ms in PFM mode and then goes to PWM mode if PWM mode has
been selected (default).
Unused Boost Converter
If the boost converter is not used, it should be disabled by writing bit en_boost low. OUT pin should be connected to GND and
FB pin to the LED supply voltage.
L
www.national.com
13
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP3936SL | Lighting Management System for Six White LEDs and One RGB or FLASH LED |
| LP3936SLX | Lighting Management System for Six White LEDs and One RGB or FLASH LED |
| LP3939 | Power Amplifier Driver For Dual Band CDMA Handsets |
| LP3939ILQ | Power Amplifier Driver For Dual Band CDMA Handsets |
| LP3939ILQX | Power Amplifier Driver For Dual Band CDMA Handsets |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP3936SL | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP3936SL/NOPB | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP3936SLX | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP3936SLX/NOPB | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP3937ILQ-AL | 制造商:Texas Instruments 功能描述:Electronic Component |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。