Datenblatt-Suchmaschine für elektronische Bauteile |
|
NCP5602 Datenblatt(PDF) 8 Page - ON Semiconductor |
|
NCP5602 Datenblatt(HTML) 8 Page - ON Semiconductor |
8 / 12 page NCP5602 http://onsemi.com 8 The physical address of the NCP5602 is 1001 111X, the X being the Read/Write identifier as defined by the I2C specification. Since the NCP5602 does not return data, the first byte of the I2C frame shall be 1001 1110 ($9E) as depicted in Table 2. Table 1. NCP5602 Physical I2C Address B7 B6 B5 B4 B3 B2 B1 B0 1 0 0 1 1 1 1 0 To set up a new output current value, a full frame shall be sent by the MCU. The frame contains three consecutive bytes and shall fulfill the I2C specifications: First byte : I2C address ³$9E Second byte : internal register address ³$01 Third byte : output current value ³$00 to $1E (0 mA to 30 mA, Assuming Rext = 10 k W) The waveforms given in Figure 9 illustrate a typical output current update. Figure 9. Typical NCP5602 I2C Startup Sequence Dimming The built−in I2C interface provides a simple way to accurately control the output current flowing in the two LED. Such dimming is active under the NORMAL mode only and the LED2 current cannot be adjusted when the ICON mode is active. The internal register LED−REG[0..7] is set up by the content of the SDA byte sent by the external MCU as depicted in Table 2. For typical application, the 60 mA reference current forced by the external resistor is multiply by 16 to get a 1.0 mA/step in the output LED. The waveforms given Figure 10 illustrate a normal programming sequence. Table 2. LED−REG[0..7] Internal Register Bits Assignment B7 B6 B5 B4 B3 B2 B1 B0 RFU RFU ICON IREF*16*16 IREF*16*8 IREF*16*4 IREF*16*2 IREF*16 [B7,B6] = RFU:bits reserved for future use B5 = ICON:control the NORMAL/ICON mode of operation: ICON = Low ³ Normal MODE takes place, the two LED are activated and the current can be adjusted from 0 mA to 30 mA maximum per LED. ICON = High ³ ICON mode takes place, LED#1 is deactivated, the current to LED#2 being setup to 450 mA. It is not possible to adjust this current. [B4..B0]= Output LED current. The content of these bits is latched to the current reference on the 8th SCK clock pulse. The DC−DC converter is switched OFF and the two LED are disconnected when LED−REG=$00. |
Ähnliche Teilenummer - NCP5602 |
|
Ähnliche Beschreibung - NCP5602 |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |