LT8362
Recommended for New Designs
The LT8362 is a current mode DC/DC converter with a 60V, 2A switch operating from a 2.8V to 60V input. With a unique single feedback pin architecture it...
Datasheet
LT8362 on Analog.com
I'm trying to build a step up converter to for from 6.5-8.3V DC all the way up to 48V with a maximum load of 15W.
I've gone with SEPIC configuration of an LT8362. I've gone with SEPIC over boost only to allow the output to be switched off completely.
My schematics attached below.
The problem I have is this, at no load Vout is a nice 48V, however as the load on the output goes above 2W, Vout drops back down to about 20V. Is someone able to give me some tips on what I can do to try an diagnose and resolve this problem?.
| C3, C11 | Ceramic Capactior 1206 1uF 100V X7R | Samsung | CL31B105KCHSNNE |
| C10 | Ceramic Capactior 4.7PF 100V C0G/NPO 0603 | YAGEO | CC0603CRNPO0BN4R7 |
| C12 | Ceramic Capactior 0603 10nF 16V X7R | YAGEO | CC0603KRX7R7BB103 |
| C14 | Ceramic Capactior 0603 1nF 100V X7R | Samsung Electro-Mechanics | CL10B102KC8NNNC |
| R1, R2 | RES 1M OHM 1% 1/10W 0603 | Stackpole Electronics Inc | RMCF0603FT1M00 |
| R4-R6, R8 | RES 34K OHM 1% 1/10W 0603 | Stackpole Electronics Inc | RMCF0603FT34K0 |
| R7, R9 | RES 0 OHM 1% 1/10W 0603 | YAGEO | AC0603JR-130RL |
| Q2 | 0.17A Id, 100V Vds, N-Channel MOSFET, SOT-23 | BSS123-7-F | |
| C1, C2, C4-C9 | Ceramic Capactior 0603 4.7uF 100V XR7 | KYOCERA AVX | 12101C475K4T2A |
| U1 | Switching Voltage Regulators Low IQ Boost/SEPIC/ Inverting Converter with 2A, 60V Switch | Analog Devices | LT8362EDD#PBF |
| L1 | INDUCT ARRAY 2 COIL 15UH SMD | Bourns Inc. | SRF1260-150M |
| D1 | Diode Schottky 150 V 1A Surface Mount SOD-123FL | SMC Diode Solutions | DSS115UTR |
| Q1 | MOSFET P-CH 30V 8A 6TSOP | Vishay Siliconix | SI3421DV-T1-GE3 |
| F1 | FUSE 0603 6A , 70A In rush current | AEM | F0603HI6000V032TM |
