Data Brief SZ1101 (Silanna) - 3
| Manufacturer | Silanna |
| Description | Flyback PWM Controller with Integrated Active Clamp Circuit |
| Pages / Page | 4 / 3 — PRODUCT BRIEF. SZ1101. Typical Application Circuit |
| File Format / Size | PDF / 427 Kb |
| Document Language | English |
PRODUCT BRIEF. SZ1101. Typical Application Circuit
Model Line for this Datasheet
Text Version of Document
PRODUCT BRIEF SZ1101 Typical Application Circuit
VBULK Primary Secondary VOUT COUT Secondary FET RDAMP Primary FET C * BST * V5OUT CC SR1 CBULK * * DCL D * R BST GATE RSENSE Sync Rec DGATE BOOT_CL (4) SW (3) ISNS (11) GATE (8) 10V Startup Active Clamp Regulator Regulator1 Auxiliary FET V10 (7) D * AUX CLAMP (1) C Disconnect FET V V10 CA BUS 2 IS_REF 5V RC1 LDO Active Main V5OUT (13) Clamp Switch Driver LS R ISENSE Driver CV5OUT sns CLMP_S (16) COMPS R U PU 1 AC NTC R CC2 COMPS C2 OptiM COMP TEMP (9) USB-PD Bandgap R 0 t OptiMode T2 - R NTC_REF 1 C1 AC_REF R USB-PD C B1 2 Digital RA1 VAUX_S (14) VBULK_S (15) VBULK Clock COMPS Gen QR COMP CA2 R VOUT R A2 B2 C PulseLink A V5OUT B2 D Encoder/Decoder C RFB RS1 VBULK_REF O1 FB (12) RS2 DGND (10) GND (6)
Figure 4. Typical Application Circuit of an USB-PD Active Clamp Flyback Converter using SZ1101
Notes: * Critical components are identified with red dotted circles. Careful considerations are required when selecting these components for reliable operation of the device. 1. The discrete regulator is required as the output voltage varies over a wide range in USB-PD applications (5-20 V). 2 Removing RC1 and RC2 resistors and connecting CLMP_S pin to V5OUT pin results in conducted EMI suppression above 2 MHz with a minimal efficiency penalty (~0.1%). Silanna Semiconductor Proprietary and Confidential Page 3 For more information: http://www.SilannaSemi.com/ Document 10853 Ver. 4.0
VBULK Primary Secondary VOUT COUT Secondary FET RDAMP Primary FET C * BST * V5OUT CC SR1 CBULK * * DCL D * R BST GATE RSENSE Sync Rec DGATE BOOT_CL (4) SW (3) ISNS (11) GATE (8) 10V Startup Active Clamp Regulator Regulator1 Auxiliary FET V10 (7) D * AUX CLAMP (1) C Disconnect FET V V10 CA BUS 2 IS_REF 5V RC1 LDO Active Main V5OUT (13) Clamp Switch Driver LS R ISENSE Driver CV5OUT sns CLMP_S (16) COMPS R U PU 1 AC NTC R CC2 COMPS C2 OptiM COMP TEMP (9) USB-PD Bandgap R 0 t OptiMode T2 - R NTC_REF 1 C1 AC_REF R USB-PD C B1 2 Digital RA1 VAUX_S (14) VBULK_S (15) VBULK Clock COMPS Gen QR COMP CA2 R VOUT R A2 B2 C PulseLink A V5OUT B2 D Encoder/Decoder C RFB RS1 VBULK_REF O1 FB (12) RS2 DGND (10) GND (6)
Figure 4. Typical Application Circuit of an USB-PD Active Clamp Flyback Converter using SZ1101
Notes: * Critical components are identified with red dotted circles. Careful considerations are required when selecting these components for reliable operation of the device. 1. The discrete regulator is required as the output voltage varies over a wide range in USB-PD applications (5-20 V). 2 Removing RC1 and RC2 resistors and connecting CLMP_S pin to V5OUT pin results in conducted EMI suppression above 2 MHz with a minimal efficiency penalty (~0.1%). Silanna Semiconductor Proprietary and Confidential Page 3 For more information: http://www.SilannaSemi.com/ Document 10853 Ver. 4.0
