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LTC3827H
LTC3827H - Brand New Linear Technology 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 LTC®3783 is a current mode LED driver and boost, flyback and SEPIC
controller that drives both an N-channel power MOSFET and an N-channel load
PWM switch. When using an external load switch, the PWMIN input not only
drives PWMOUT, but also enables controller GATE switching and error amplifier
operation, allowing the controller to store load current information while
PWMIN is low. This feature (patent pending) provides extremely fast, true PWM
load switching with no transient overvoltage or undervoltage issues; LED
dimming ratios of 3000:1 can be achieved digitally, avoiding the color shift
normally associated with LED current dimming. The FBP pin allows analog
dimming of load current, further increasing the effective dimming ratio by
100:1 over PWM alone.
In applications where output load current must be returned to VIN, optional
constant current/constant voltage regulation controls either output (or input)
current or output voltage and provides a limit for the other. ILIM provides a
10:1 analog dimming ratio.
For low- to medium-power applications, No RSENSE mode can utilize the power
MOSFET’s on-resistance to eliminate the current-sense resistor, thereby
maximizing efficiency.
The IC’s operating frequency can be set with an external resistor over a 20kHz
to 1MHz range and can be synchronized to an external clock using the SYNC pin.
The LTC3783 is available in the 16-lead DFN and TSSOP packages.
FEATURES
■ True Color PWMTM Delivers Constant Color with 3000:1 Dimming Ratio
■ Fully Integrated Load FET Driver for PWM Dimming Control of High Power LEDs
■ 100:1 Dimming from Analog Inputs
■ Wide FB Voltage Range: 0V to 1.23V
■ Constant Current or Constant Voltage Regulation
■ Low Shutdown Current: IQ = 20µA
■ 1% 1.23V Internal Voltage Reference
■ 2% RUN Pin Threshold with 100mV Hysteresis
■ Programmable Operating Frequency (20kHz to 1MHz) with One External Resistor
■ Synchronizable to an External Clock Up to 1.3fOSC
■ Internal 7V Low Dropout Voltage Regulator
■ Programmable Output Overvoltage Protection
■ Programmable Soft-Start
■ Can be Used in a No RSENSETM Mode for VDS < 36V
■ 16-Lead DFN and TSSOP Packages
APPLICATIONS
■ High Voltage LED Arrays
■ Telecom Power Supplies
■ 42V Automotive Systems
■ 24V Industrial Controls
■ IP Phone Power Supplies
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 |
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