UC2844G-S08-R – UTC High Performance Current Mode PWM Controller IC

Quick Answer The UC2844G-S08-R is a high-performance fixed-frequency current-mode PWM controller from Unisonic Technologies (UTC). It is specifically designed for off-line and DC-DC converter applications with minimal external parts count. Featuring a 16V/10V UVLO threshold, totem-pole output, and cycle-by-cycle current limiting, it is ideal for cost-effective flyback, forward, and boost converters in power supplies and industrial applications.

Current Stock at ICMASS: Strong inventory available for immediate worldwide delivery.

Key Specifications

[Download Official UC2844 Datasheet PDF]

Why Choose UC2844G-S08-R?

• Optimized for off-line and DC-DC converters
• Current-mode control with automatic feed-forward compensation
• Latching PWM for cycle-by-cycle current limiting
• Internally trimmed reference with UVLO and hysteresis
• High current totem-pole output for direct MOSFET drive
• Low startup and operating current
• Excellent noise immunity
• Pb-free, RoHS compliant, and halogen-free

Typical Applications

• Offline AC-DC flyback power supplies
• DC-DC buck, boost, and flyback converters
• Battery chargers
• LED drivers and lighting power supplies
• Industrial control power modules
• Adapter and charger systems
• Telecom and networking power supplies
• Consumer electronics SMPS

UC2844G-S08-R Alternatives & Cross Reference Popular Alternatives:

• UC3844 / UC2844 (Texas Instruments / onsemi originals)
• UC2845G-S08-R (different UVLO threshold)
• KA3844 / SG3844 series
• TL3844 (TI)
• Other UTC UC28xx series

Comparison Table:

Purchasing Information at ICMASS

• Stock Status: Strong inventory available
• MOQ: 100 pieces (samples welcome)
• Lead Time: 1-3 days for stock orders
• Shipping: Fast global delivery (DHL, UPS, FedEx)
• Quality Guarantee: 100% genuine UTC components

Get Competitive Quote – Contact us for bulk pricing and technical support.

Frequently Asked Questions (FAQ)

Q1: What is the UC2844G-S08-R mainly used for? A: It is a current-mode PWM controller for designing high-efficiency off-line and DC-DC switching power supplies.

Q2: What is the UVLO threshold? A: 16V start-up and 10V shutdown.

Q3: What is the maximum switching frequency? A: Up to 500 kHz.

Q4: What package does the UC2844G-S08-R use? A: SOP-8 (S08) surface mount package, supplied in Tape & Reel.

Q5: What is the maximum output duty cycle? A: 50%.

Q6: Can it directly drive a power MOSFET? A: Yes, with high-current totem-pole output (1A peak).

Q7: What protection features does it include? A: Cycle-by-cycle current limiting, UVLO with hysteresis, and over-temperature protection.

Q8: Do you have real stock of UC2844G-S08-R? A: Yes, we maintain good inventory levels for fast delivery.

Q9: What is the typical startup current? A: Very low, typically under 0.5 mA.

Q10: Can you provide reference designs or layout recommendations? A: Yes, we supply official UTC datasheet and application support.

Q11: Do you offer volume pricing? A: Yes. Competitive tiered pricing is available for quantities from 1K to 100K+.

Q12: How does UC2844G compare to UC2845G? A: UC2844G has higher UVLO threshold (16V/10V) making it suitable for universal input AC-DC supplies, while UC2845G is for lower input voltage applications.

Related Products

• UTC UC28xx Series PWM Controllers
• UC384x / UC284x Family
• Other UTC Power Management ICs
• Voltage Mode and Current Mode PWM Controllers