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Renesas UPC1934GR-1JG-E1-A
- Part No.:
- UPC1934GR-1JG-E1-A
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
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UPC1934GR-1JG-E1-A.pdf
- Description:
- IC REG LIN SWITCHING REG/CNTRLR
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Product details
Overview
UPC1934GR-1JG-E1-A from Renesas Electronics is a dual-channel DC-DC converter control IC with open-drain MOS outputs, 2.5 V minimum supply voltage, 20 V maximum operating voltage, and 20–1000 kHz programmable oscillation frequency. It implements timer-latch short-circuit protection using a 0.1 µF delay capacitor and supports step-down, step-up, and inverting topologies in portable power systems.
For engineers reviewing the UPC1934GR-1JG-E1-A datasheet, UPC1934GR-1JG-E1-A pinout, UPC1934GR-1JG-E1-A application, or UPC1934GR-1JG-E1-A equivalent, key selection considerations include dual-channel PWM timing control, 2.1 V internal reference accuracy (±50 mV), open-drain output sink capability (1.4 mA min), dead-time programmability per channel, and ceramic-capacitor-based short-circuit latch timing.
Technical Context
The UPC1934GR-1JG-E1-A integrates two independent error amplifiers (E/A1 and E/A2) with 0–0.4 V common-mode input range, each feeding a dedicated PWM comparator driven by a shared CT/RT-generated triangular oscillator waveform. Each channel features separate dead-time control (DTC1/DTC2) pins to adjust ON/OFF overlap margins.
Its short-circuit protection uses a dedicated SCP comparator monitoring FB1/FB2 outputs; when either drops below 0.63 V, a constant-current source charges CDLY via the DLY pin, triggering a flip-flop latch at 0.8 V to disable both OUT1 and OUT2. Reset requires VCC < 1.0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 20 V - Enables operation from single Li-ion cell (3.0–3.7 V) or AC adapter inputs without external LDO. |
| Oscillation Frequency | 20 kHz to 1000 kHz - Set via RT resistor and CT capacitor; ±15% accuracy at nominal conditions. |
| Reference Voltage | 2.1 V ±0.1 V - Internally generated bandgap reference (pin 16); used for feedback sensing and internal biasing. |
| Output Sink Current | 1.4 mA min at VOL = 0.6 V - Supports direct drive of external N-channel MOSFET gates or bipolar buffer transistors. |
| Short-Circuit Delay Time | 50 ms with 0.1 µF CDLY - Programmable latch activation time prevents false triggering during transient load steps. |
| Operating Temperature | −20 °C to +85 °C - Qualified for industrial ambient environments; no derating required up to 85 °C. |
| Output Withstand Voltage | 30 V absolute max - Allows use with higher-voltage switching nodes (e.g., 24 V bus-derived converters). |
Pinout & Package
UPC1934GR-1JG-E1-A is housed in a 16-pin plastic SSOP package (5.72 mm width, 0.65 mm pitch), with gull-wing leads and exposed thermal pad not present. Package dimensions comply with JEDEC MO-153 variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CT (Pin 1) | Oscillator timing node | Connects to timing capacitor; sets oscillator frequency with RT (Pin 2) per fOSC ≈ 0.375/(CT × RT). |
| RT (Pin 2) | Oscillator timing node | Connects to timing resistor; forms RC network with CT to define switching frequency. |
| IN1 / IN2 (Pins 3, 14) | Error amp non-inverting input | Accepts regulated output voltage divider feedback; common-mode range limited to 0–0.4 V. |
| II1 / II2 (Pins 4, 13) | Error amp inverting input | Connected to output voltage divider midpoint; determines regulation setpoint via resistor ratio. |
| FB1 / FB2 (Pins 5, 12) | Error amp output | Drives PWM comparator inverting input; drops below 0.63 V to trigger short-circuit latch. |
| DTC1 / DTC2 (Pins 6, 11) | Dead-time control input | Adjusts PWM duty overlap margin; high level (>1.6 V) forces 0% duty; low level enables soft-start. |
| OUT1 / OUT2 (Pins 7, 10) | Open-drain output | N-channel MOS output stage; sinks current to drive external switch gate or buffer transistor base. |
| GND (Pin 8) | Analog/digital ground | Common return for all internal circuits; must be separated from power ground in layout. |
| VCC (Pin 9) | Power supply input | Supplies entire IC; UVLO activates below 1.5 V; operates down to 2.5 V with full functionality. |
| DLY (Pin 15) | Short-circuit latch timing | Charged by internal current source during fault; reaches 0.8 V to trip latch; reset by VCC < 1.0 V. |
| VREF (Pin 16) | 2.1 V reference output | Stable bandgap reference; requires 0.01–10 µF bypass capacitor; used for feedback and biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM channels | Enables synchronous control of buck and inverting regulators from one IC, reducing BOM count and PCB area. |
| Timer-latch short-circuit protection | Prevents destructive overcurrent by latching OFF both outputs until power cycle; eliminates need for external fault logic. |
| Low 2.5 V start-up voltage | Supports battery-powered systems with deep discharge tolerance; maintains regulation as Li-ion voltage drops to 2.5 V. |
| Open-drain MOS outputs | Allows flexible interface with N-channel MOSFETs or NPN transistors; withstands 30 V drain voltage for high-side bootstrap designs. |
| Programmable dead-time per channel | Reduces shoot-through risk in half-bridge configurations by independently adjusting timing margins on each output path. |
Applications
| Portable Medical Sensors | Industrial Handheld Terminals |
|---|---|
Use Scenario: Powering dual-rail analog front-ends (±5 V) from a single 3 V Li-ion cell in wearable ECG monitors. IC Role / Device Role / Timing Role: UPC1934GR-1JG-E1-A controls chopper-type step-up and inverting regulators to generate stable ±5 V rails with synchronized switching. Use Value: Eliminates need for separate boost and inverter ICs; 2.5 V minimum operation extends usable battery life by >15% versus 3.0 V-start competitors. | Use Scenario: Providing isolated 5 V and −5 V supplies for RS-232 transceivers and LCD bias in ruggedized field data loggers. IC Role / Device Role / Timing Role: UPC1934GR-1JG-E1-A drives external NPN buffers to regulate dual outputs while maintaining tight cross-regulation under dynamic load changes. Use Value: Dual-channel error amplifiers enable independent feedback loops, achieving <±2% output deviation across 10–100 mA load range. |
| Wireless IoT Sensor Nodes | Automotive Body Control Modules |
Use Scenario: Generating 3.3 V and 5 V rails from a 12 V vehicle battery via intermediate 5 V buck stage in smart parking sensors. IC Role / Device Role / Timing Role: UPC1934GR-1JG-E1-A operates in step-down mode for primary 5 V rail and step-up for auxiliary 3.3 V rail with shared oscillator timing. Use Value: Single-IC dual control reduces component count by 30% and improves thermal coupling between channels for consistent timing stability. | Use Scenario: Powering microcontroller I/O banks and CAN transceiver interfaces requiring clean, isolated 3.3 V and 5 V supplies in door module ECUs. IC Role / Device Role / Timing Role: UPC1934GR-1JG-E1-A manages two independent DC-DC stages with channel-specific dead-time tuning to prevent shoot-through in high-noise automotive environments. Use Value: Timer-latch protection responds within 50 ms to shorted output traces, preventing thermal runaway without external supervision circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL5001CDR | Single-channel PWM controller; no integrated reference; requires external 2.5 V reference; 100 kHz fixed frequency option only. | Lacks dual-channel capability and programmable short-circuit latch; suitable only for single-output designs. | Select TL5001CDR only when cost sensitivity outweighs channel count and protection requirements. |
| UC3844BD1R2G | Current-mode controller with 1 A peak gate drive; no built-in reference; 250 kHz max frequency; no short-circuit latch function. | Requires external fault detection circuitry; better suited for high-current flyback or forward converters than low-voltage dual-rail generation. | Choose UC3844BD1R2G for higher-power (>1 W) isolated topologies where current sensing is preferred over voltage-mode control. |
Compared with TL5001CDR and UC3844BD1R2G, UPC1934GR-1JG-E1-A uniquely delivers dual-channel voltage-mode control, integrated 2.1 V reference, and self-contained timer-latch protection-enabling compact, robust dual-rail power in space-constrained battery systems without external support components.
Availability
UPC1934GR-1JG-E1-A is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld terminals, wireless IoT sensor nodes, and automotive body control modules requiring stable component supply and long-term design continuity.
Supply support for UPC1934GR-1JG-E1-A 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
Renesas Electronics Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog and power management ICs, and system-on-chip solutions for industrial, automotive, and consumer applications.
The UPC1934GR-1JG-E1-A belongs to Renesas' legacy BiCMOS DC-DC controller product line, designed specifically for low-input-voltage, dual-output power conversion in battery-powered portable equipment.
FAQ
What is the minimum supply voltage required for UPC1934GR-1JG-E1-A to operate?
The UPC1934GR-1JG-E1-A has a minimum supply voltage of 2.5 V, enabling reliable startup and regulation from partially discharged lithium-ion cells. Its under-voltage lockout releases at 1.57 V (rising) and re-engages at 1.5 V (falling), with hysteresis of 30–70 mV. This ensures stable operation across the full 2.5–20 V recommended range without brownout resets.
How does the short-circuit protection work in UPC1934GR-1JG-E1-A?
The UPC1934GR-1JG-E1-A uses a timer-latch method: when FB1 or FB2 falls below 0.63 V, the SCP comparator triggers and begins charging CDLY via the DLY pin. At 0.8 V, the internal flip-flop latches both OUT1 and OUT2 OFF. Recovery requires cycling VCC below 1.0 V. The delay is precisely set by CDLY (e.g., 50 ms with 0.1 µF), avoiding nuisance tripping during load transients.
Can UPC1934GR-1JG-E1-A drive MOSFETs directly?
UPC1934GR-1JG-E1-A provides open-drain N-channel outputs rated for 21 mA sink current and 30 V withstand voltage. While it can directly drive small-signal MOSFET gates (e.g., 2N7002), external buffer transistors (e.g., µPA609T) are recommended for power MOSFETs due to gate charge requirements. The 0.6 V max VOL at 20 mA ensures strong low-state drive for logic-level devices.
What is the function of the VREF pin on UPC1934GR-1JG-E1-A?
The VREF pin (Pin 16) delivers a precision 2.1 V ±0.1 V bandgap reference used internally for error amplifier biasing and externally for feedback divider referencing. It must be bypassed with 0.01–10 µF ceramic capacitor to suppress noise. This reference enables accurate output voltage setting without external references, reducing component count in dual-rail designs.
Is UPC1934GR-1JG-E1-A pin-compatible with other variants in the µPC1934 family?
Yes - UPC1934GR-1JG-E1-A shares identical pinout and electrical behavior with UPC1934GR-PJG (TSSOP package). Both use the same 16-pin layout, function mapping, and timing characteristics. Differences are strictly mechanical: SSOP (UPC1934GR-1JG-E1-A) has 5.72 mm body width and 0.65 mm pitch; TSSOP (UPC1934GR-PJG) has 4.4 mm width and tighter leadform. No circuit redesign is needed for footprint interchange.
UPC1934GR-1JG-E1-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
UPC1934GR-1JG-E1-A FAQ
1.How can I place an order for UPC1934GR-1JG-E1-A through Aetrix?
Please submit a Request for Quotation (RFQ) for UPC1934GR-1JG-E1-A 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 UPC1934GR-1JG-E1-A reliable?
The price and inventory of UPC1934GR-1JG-E1-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPC1934GR-1JG-E1-A is usually 5 days.
3.What payment methods are accepted for UPC1934GR-1JG-E1-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPC1934GR-1JG-E1-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPC1934GR-1JG-E1-A?
UPC1934GR-1JG-E1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPC1934GR-1JG-E1-A 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 UPC1934GR-1JG-E1-A?
For technical support, including UPC1934GR-1JG-E1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPC1934GR-1JG-E1-A requirements.
6.How does Aetrix verify that UPC1934GR-1JG-E1-A is sourced from the original manufacturer or authorized distributors?
All UPC1934GR-1JG-E1-A 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 UPC1934GR-1JG-E1-A meets industry standards.
7.What is the process for return or replacement of UPC1934GR-1JG-E1-A?
All UPC1934GR-1JG-E1-A units undergo pre-shipment inspection (PSI). If there is an issue with UPC1934GR-1JG-E1-A, 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 UPC1934GR-1JG-E1-A part is unused and in its original packaging.
Return procedure for UPC1934GR-1JG-E1-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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