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Texas Instruments LM5107SD/NOPB
- Part No.:
- LM5107SD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM5107SD/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,347
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Product details
Overview
LM5107SD/NOPB from Texas Instruments is a high-voltage, dual-channel, independent TTL-compatible gate driver IC designed to control high-side and low-side N-channel MOSFETs in half-bridge and synchronous buck topologies. It delivers 1.4-A peak sink / 1.3-A peak source output current, supports bootstrap supply up to 118 V DC, features 27-ns typical propagation delay, and integrates a high-voltage bootstrap diode - enabling robust 100-V rail operation in motor drives and isolated DC-DC converters.
For engineers reviewing the LM5107SD/NOPB datasheet, LM5107SD/NOPB pinout, LM5107SD/NOPB application, or LM5107SD/NOPB equivalent, key selection considerations include its independent HI/LI logic control, UVLO on both VDD and HB rails, 15-ns rise/fall times into 1000-pF load, and SOIC-8 package compatibility with thermal design constraints for industrial power stages.
Technical Context
The LM5107SD/NOPB implements a robust level-shifting architecture to drive the floating high-side output (HO) referenced to the HS node, enabling clean, matched switching transitions between HO and LO despite >100-V HS voltage swings. Its integrated bootstrap diode (VDH = 0.82–1.1 V at 100 mA) eliminates external diode requirements while maintaining fast turn-off (tBS = 105 ns) and low dynamic resistance (RD = 0.8–1.5 Ω).
UVLO protection operates independently on VDD (6.9-V rising threshold, 0.5-V hysteresis) and HB (6.6-V rising threshold, 0.4-V hysteresis), ensuring safe startup and fault recovery. Propagation delay matching between high- and low-side paths is tightly controlled (tMON/tMOFF ≤ 2 ns typical), critical for minimizing shoot-through risk in high-frequency bridge designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Current | 1.4-A peak pulldown / 1.3-A peak pullup - sufficient to rapidly charge/discharge ≥1000-pF gate capacitances at high switching frequencies. |
| Bootstrap Voltage Range | HB to HS: 8–14 V nominal - enables reliable high-side gate drive across wide input voltage ranges in buck/half-bridge converters. |
| Propagation Delay | 27–56 ns (typical 27 ns) - ensures sub-50-ns timing precision for PWM frequencies up to 1 MHz with tight dead-time control. |
| Delay Matching | ≤2 ns typical (tMON/tMOFF) - minimizes overlap between HO/LO transitions, reducing shoot-through risk without requiring external dead-time circuitry. |
| UVLO Thresholds | VDD: 6.9 V (±0.5 V hysteresis); HB: 6.6 V (±0.4 V hysteresis) - prevents erratic switching during brown-out or bootstrap capacitor discharge events. |
| Rise/Fall Time | 15 ns into 1000-pF load - supports efficient switching of medium-power MOSFETs with reduced EMI and conduction losses. |
| Supply Voltage Range | VDD: 8–14 V; HS: −1 V to 100 V - allows direct integration into 12-V control rails driving 100-V bus applications like motor inverters. |
Pinout & Package
LM5107SD/NOPB is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body size) with standard lead pitch and exposed thermal pad not present - thermal management relies on PCB copper area under the package per TI's layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Low-side gate drive supply | Primary bias rail for LI input, LO output, and internal logic; must be locally decoupled with low-ESR capacitor near pin. |
| HI (Pin 2) | High-side input control | TTL-compatible (VIH = 1.8–2.2 V); unused HI must be tied to VSS to prevent floating logic states. |
| LI (Pin 3) | Low-side input control | TTL-compatible (VIL = 0.8–1.8 V); independent of HI - enables asymmetric or phase-shifted drive schemes. |
| VSS (Pin 4) | Ground reference | Common return for LI, HI, LO, and internal circuitry; must connect to low-impedance system ground plane. |
| LO (Pin 5) | Low-side gate driver output | Drives gate of low-side N-MOSFET referenced to VSS; capable of 1.4-A sink / 1.3-A source into capacitive loads. |
| HS (Pin 6) | High-side source node | Connects to source of high-side MOSFET and negative terminal of bootstrap capacitor; floats up to 100 V above VSS. |
| HO (Pin 7) | High-side gate driver output | Drives gate of high-side N-MOSFET referenced to HS; output swing is VHB–VHS (not VDD–VSS). |
| HB (Pin 8) | High-side bootstrap supply rail | Connects to positive terminal of bootstrap capacitor; supplies gate drive for HO; rated to 118 V DC maximum. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Diode | Eliminates external diode requirement; 100-mA forward drop of 0.82–1.1 V enables compact, cost-optimized high-side biasing. |
| Independent TTL Inputs | HI and LI accept standard 3.3-V/5-V logic signals with defined VIH/VIL thresholds - simplifies interface with microcontrollers and PWM controllers. |
| Dual Independent UVLO | Separate lockout on VDD and HB rails ensures safe operation even if bootstrap capacitor fails to recharge - prevents partial high-side activation. |
| Level-Shifter Propagation Matching | 2-ns typical delay mismatch between HO and LO paths - reduces need for external dead-time insertion and improves efficiency in bridge topologies. |
| 100-V High-Side Capability | HS pin rated to −1 V to +100 V; enables use in 48-V, 60-V, and 100-V bus systems including solid-state motor drives and telecom power supplies. |
Applications
| Current-Fed Push-Pull Converters | Half-Bridge Power Converters |
|---|---|
Use Scenario: High-efficiency isolated DC-DC conversion in telecom and server PSUs using push-pull topology with center-tapped transformer. IC Role / Device Role / Timing Role: Gate driver controlling complementary N-MOSFET pairs on primary side; HO/LO independently timed to avoid cross-conduction. Use Value: Integrated bootstrap diode and 100-V HS rating eliminate external components and support 48-V input operation with minimal BOM count. |
Use Scenario: Medium-power DC-AC inverter stage in UPS or solar microinverters operating from 30–100-V DC bus. IC Role / Device Role / Timing Role: Dual-output driver providing synchronized, matched-edge switching for upper/lower legs with programmable dead time via controller. Use Value: 2-ns propagation matching and 15-ns edge rates reduce switching losses and EMI in 100-kHz–500-kHz bridge designs. |
| Solid-State Motor Drives | Two-Switch Forward Converters |
Use Scenario: Brushless DC motor control in industrial actuators where compact size and thermal reliability are critical. IC Role / Device Role / Timing Role: Half-bridge driver for each phase leg; HI/LI inputs driven by MCU PWM with independent enable/disable capability. Use Value: SOIC-8 package with proven thermal performance (RθJA = 109.6°C/W) supports continuous 1.3-A gate drive without heatsinking in 70°C ambient. |
Use Scenario: High-voltage auxiliary power supply in industrial PLCs using two-switch forward topology for 24-V/48-V outputs. IC Role / Device Role / Timing Role: Controls synchronous rectification or primary-side switches; leverages HB rail for self-biased high-side drive. Use Value: Bootstrap supply voltage up to 118 V DC enables operation with wide input transients (e.g., 100-V surges) without auxiliary bias winding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC27201D | Higher 4-A peak output, 12-V max VDD, no integrated bootstrap diode, WSON-8 only | Requires external bootstrap diode; better suited for high-current, low-inductance layouts where thermal density is managed | Select when >2-A gate drive or enhanced thermal performance (RθJB = 15.9°C/W) is required and board space allows external diode |
| IRS21844PbF | 100-V HS rating, 2.5-A peak, no integrated bootstrap diode, 14-V max VDD, SOIC-8 | Lacks on-chip bootstrap diode; requires external diode and larger bootstrap capacitor due to higher quiescent HB current | Choose when legacy compatibility with IR's pinout and timing behavior is needed, and external diode placement is acceptable |
Compared with UCC27201D and IRS21844PbF, LM5107SD/NOPB offers unique integration of the bootstrap diode in SOIC-8, lower gate drive current (1.4 A vs 2.5–4 A), and tighter propagation matching (2 ns vs 5–10 ns), making it optimal for cost-sensitive, space-constrained 100-V half-bridge designs where component count reduction is prioritized over ultra-high peak current.
Availability
LM5107SD/NOPB is available at Aetrix Electronics and suitable for current-fed push-pull converters, half-bridge power converters, and solid-state motor drives requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant sourcing.
Supply support for LM5107SD/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
The LM5107SD/NOPB belongs to TI's high-voltage gate driver product line, engineered specifically for cost-effective, reliable control of N-channel MOSFETs in half-bridge, synchronous buck, and isolated DC-DC topologies - emphasizing integration, thermal robustness, and ease of use in power supply design.
FAQ
What is the maximum bootstrap supply voltage supported by the LM5107SD/NOPB?
The LM5107SD/NOPB supports a maximum HB-to-HS voltage of 18 V per absolute ratings, but its recommended operating range is VHB = VHS + 8 V to VHS + 14 V. The device's bootstrap supply can reach up to 118 V DC relative to VSS, enabling use in high-voltage bus applications - this value reflects the maximum voltage the HB pin can withstand, not the functional drive voltage.
Does the LM5107SD/NOPB require an external bootstrap diode?
No, the LM5107SD/NOPB integrates a high-voltage bootstrap diode with 100-mA forward current capability and 0.82–1.1 V forward voltage drop. This eliminates the need for an external diode in most applications, reducing BOM count and PCB area - though an external diode may be added in high-frequency, high-capacitance designs to reduce internal power dissipation.
What are the UVLO thresholds for VDD and HB in the LM5107SD/NOPB?
The LM5107SD/NOPB features dual independent UVLO circuits: VDD rising threshold is 6.9 V (with 0.5-V hysteresis), and HB rising threshold is 6.6 V (with 0.4-V hysteresis). These thresholds ensure the low-side driver remains disabled until VDD is stable, and the high-side driver is inhibited if the bootstrap capacitor voltage falls below safe operating levels - preventing erratic gate drive.
Can the LM5107SD/NOPB drive both high-side and low-side MOSFETs simultaneously in a full-bridge configuration?
Yes, the LM5107SD/NOPB can drive one half-bridge leg (one high-side and one low-side MOSFET) in a full-bridge configuration. To implement a full bridge, two LM5107SD/NOPB devices are required - one per leg - because each IC controls only a single high-side and low-side pair with independent HI/LI inputs and separate HB/HS rails.
What is the thermal resistance (RθJA) of the LM5107SD/NOPB in SOIC-8 package?
The LM5107SD/NOPB in SOIC-8 (D package) has a junction-to-ambient thermal resistance (RθJA) of 109.6°C/W under standard JEDEC test conditions (single-layer 1-in² copper pad). This value assumes proper PCB layout with adequate copper pour; actual thermal performance improves significantly with increased copper area and multiple vias to inner ground planes.
LM5107SD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Independent
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 8V ~ 14V
- Logic Voltage - VIL, VIH:
- 0.8V, 2.2V
- Current - Peak Output (Source, Sink):
- 1.3A, 1.4A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 118 V
- Rise / Fall Time (Typ):
- 15ns, 15ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (4x4)
LM5107SD/NOPB FAQ
1.How can I place an order for LM5107SD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5107SD/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM5107SD/NOPB reliable?
The price and inventory of LM5107SD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5107SD/NOPB is usually 5 days.
3.What payment methods are accepted for LM5107SD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5107SD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5107SD/NOPB?
LM5107SD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5107SD/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM5107SD/NOPB?
For technical support, including LM5107SD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5107SD/NOPB requirements.
6.How does Aetrix verify that LM5107SD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5107SD/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM5107SD/NOPB meets industry standards.
7.What is the process for return or replacement of LM5107SD/NOPB?
All LM5107SD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5107SD/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM5107SD/NOPB part is unused and in its original packaging.
Return procedure for LM5107SD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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