Electronic Components Datasheet Search |
|
LT3468ES5 Datasheet(PDF) 8 Page - Linear Technology |
|
LT3468ES5 Datasheet(HTML) 8 Page - Linear Technology |
8 / 12 page LT3468/LT3468-1 8 34681i Table 2. Pre-Designed Transformers - Typical Specifications Unless Otherwise Noted. SIZE LPRI LPRI-LEAKAGE RPRI RSEC FOR USE WITH TRANSFORMER NAME (W × L × H) mm ( µH) (nH) N (m Ω)(Ω) VENDOR LT3468 SBL-5.6-1 5.6 × 8.5 × 4.0 10 200 Max 10.2 103 26 Kijima Musen LT3468-1 SBL-5.6S-1 5.6 × 8.5 × 3.0 24 400 Max 10.2 305 55 Hong Kong Office 852-2489-8266 (ph) kijimahk@netvigator.com (email) LT3468 LDT565630T-001 5.8 × 5.8 × 3.0 6 200 Max 10.4 100 Max 10 Max TDK LT3468-1 LDT565630T-002 5.8 × 5.8 × 3.0 14.5 500 Max 10.2 240 Max 16.5 Max Chicago Sales Office (847) 803-6100 (ph) www.components.tdk.com LT3468/LT3468-1 T-15-089 6.4 × 7.7 × 4.0 12 400 Max 10.2 211 Max 27 Max Tokyo Coil Engineering LT3468-1 T-15-083 8.0 × 8.9 × 2.0 20 500 Max 10.2 675 Max 35 Max Japan Office 0426-56-6336 (ph) www.tokyo-coil.co.jp All other parameters need to meet or exceed the recom- mended limits as shown in Table 1. A particularly impor- tant parameter is the leakage inductance, LLEAK. When the power switch of the LT3468/LT3468-1 turns off, the leakage inductance on the primary of the transformer causes a voltage spike to occur on the SW pin. The height of this spike must not exceed 40V, even though the absolute maximum rating of the SW Pin is 50V. The 50V absolute maximum rating is a DC blocking voltage speci- fication, which assumes that the current in the power NPN is zero. Figure 4 shows the SW voltage waveform for the circuit of Figure 1(LT3468). Note that the absolute maxi- mum rating of the SW pin is not exceeded. Figure 5 shows the SW voltage waveform for the circuit of Figure 2(LT3468- 1). Again, the absolute maximum rating of the SW pin is not compromised. Make sure to check the SW voltage waveform with VOUT near the target output voltage, as this is the worst case condition for SW voltage. It is important not to minimize the leakage inductance to a very low level. Although this would result in a very low leakage spike on the SW pin, the parasitic capacitance of the transformer would become large. This will adversely effect the charge time of the photoflash circuit. Linear Technology has worked with several leading mag- netic component manufacturers to produce pre-designed flyback transformers for use with the LT3468/LT3468-1. Table 2 shows the details of several of these transformers. Figure 4. LT3468 SW Voltage Waveform VIN = 5V VOUT = 320V VIN = 5V VOUT = 320V Figure 5. LT3468-1 SW Voltage Waveform APPLICATIO S I FOR ATIO 3468 G18 100ns/DIV VSW 10V/DIV 3468 G19 100ns/DIV VSW 10V/DIV |
Similar Part No. - LT3468ES5 |
|
Similar Description - LT3468ES5 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |