⚠ All product names, trademarks, brands, and logos on this site are the property of their respective owners. Their use is for identification purposes only and does not imply any affiliation or authorization from the rights holders. We are not authorized dealers or distributors of the brand. The warranty is provided by us, not the original manufacturer.
G1540D21U
G1540D21U - Brand New GMT IC Chips
Credit Card - One-month free return and one year warranty.
- Full or Partial Refund, if the item is not as described
- Full Refund if you don't receive your order
DESCRIPTION
The SG1540 is an integrated circuit designed to efficiently provide start-up power from a high-voltage DC bus to a PWM control circuit in a switching power supply. When used on the primary side, it reduces start-up current to less than 1mA and allows any standard PWM control circuit to be used as a primary- side controller. When used to power a controller on the secondary side, it efficiently eliminates the need for a heavy 50/60Hz line transformer with its associated low frequency magnetic fields.
FEATURES
• Useable with primary and secondary side PWM controllers
• Micropower comparator / switch
- Internal 2.5V bandgap reference
- 50mA power switch
• Squarewave oscillator
- 500Hz to 200KHz operation
- 200mA totem pole outputs
• Eliminates bulky, expensive 50/60 Hz transformer
• Minimizes high voltage bleeder current
• Programmable start-up voltage and hysteresis
• Internal and programmable overvoltage crowbar latch
• Available in 8 pin DIP, 10 pin flat pack, and 16 pin widebody SOIC
Shipping
| First item | Additional item | Service | Description |
|---|---|---|---|
| $0.00 | Free | Free Shipping | Estimated 15-30 business days via Registered Air Mail or others |
| $27.50 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
| $0.00 | Free | Buyer cooperating carrier | Using buyer's cooperating carrier. Buyer should create a shipping label and share it to us. And then we will call carrier for pickup |
| $38.00 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
Delivery
- The transportation time may be delayed due to customs clearance, local holidays or abnormal events.
- The estimated time is based on the fastest speed provided by commercial couriers (DHL, FedEx, UPS etc).
- The estimated time does not include the lead time of the item. The lead time of most items is 2–5 business days. If more than 5 working days are needed, we will manually confirm with you.
| Flag | Country | Express Delivery | Standard Delivery |
|---|---|---|---|
 | United States | 3 - 5 days | 10-15 days |
 | Canada | 3 - 5 days | 10-20 days |
 | Mexico | 3 - 5 days | 10-17 days |
 | Germany | 3 - 5 days | 10-12 days |
 | Italy | 3 - 5 days | 10-15 days |
 | United Kingdom | 3 - 5 days | 10-12 days |
Estimated Delivery
This item requires 2-5 business days for processing before shipping after payment is confirmed. And depending on the destination and shipping method.
Return Policy
| Return window | Refund type | Return shipping |
|---|---|---|
| 60 days after receiving item | Money Back or Replacement | Buyer pays for return shipping |
Verified buyer reviews for electronic components and industrial control products.
In Stock 19-22/R6G6C-A01/2T
19-22/R6G6C-A01/2T - Brand New EVERLIGHT IC Chips
In Stock 216T9NGBGA13FH
216T9NGBGA13FH - Brand New ATI IC Chips
In Stock 26.000000MHZ
26.000000MHZ - Brand New TXC IC Chips
In Stock 2N3819
2N3819 - Brand New NTE Electronics IC Chips
In Stock 2SA1460
2SA1460 - Brand New NEC IC Chips
In Stock 2SC1945
2SC1945 - Brand New MITSUBISHI IC Chips
In Stock 2SC3733-K
2SC3733-K - Brand New NEC IC Chips
In Stock 2SJ179
2SJ179 - Brand New STMicroelectronics IC Chips
In Stock 2SK170-BL
2SK170-BL - Brand New TOSHIBA IC Chips
In Stock 2SK2647-01MR
2SK2647-01MR - Brand New FUJITSU IC Chips
