P043B030-V2 — 4.3-inch IPS TFT LCD Module, 480×800, RGB 18-bit Interface

The P043B030-V2 is a 4.3-inch IPS TFT LCD module with 480(H)×800(V) pixel resolution, an 18-bit RGB parallel interface, and an ST7701S driver IC. The display area measures 56.16×93.55 mm, the outline is 60.00×104.25×2.6 mm, and the module operates from −20 °C to +70 °C. These three parameters define the integration envelope: the RGB 18-bit bus requires a host processor with a dedicated LTDC or RGB peripheral, the outline fits a 60 mm wide mechanical slot, and the temperature range covers standard industrial environments without auxiliary heating.

Luminance is 400 cd/m² with a 1500:1 contrast ratio in Normally Black mode. The all-direction IPS viewing angle maintains color accuracy beyond 80° off-axis in any plane, which makes the module usable in panel-mount HMI enclosures viewed from standing or seated positions.

Complete specifications

Interface: RGB 18-bit parallel bus and ST7701S driver IC

The P043B030-V2 uses a 45-pin connector carrying an 18-bit RGB parallel interface (6 bits per color channel: R5–R0, G5–G0, B5–B0) alongside HSYNC, VSYNC, DOTCLK, DE, and power lines. This bus maps directly to the LTDC peripheral on STM32F4/F7/H7 series MCUs and to the RGB interface on i.MX6/i.MX8 application processors. No external frame buffer IC is required when the host contains embedded SRAM sufficient for a 480×800×3-byte frame (approximately 1.1 MB).

The ST7701S driver IC accepts the RGB stream and drives the IPS panel directly. Unlike SPI-connected drivers that serialize pixel data, the RGB parallel bus transfers one full pixel per clock cycle, enabling frame rates of 60 fps at DOTCLK frequencies as low as 25 MHz. The ST7701S initialization sequence is sent over a separate 3-wire SPI or DSI port before the RGB stream begins; host BSP examples for STM32 and i.MX are available in the ST7701S application note.

Optical performance: 400 nit, 1500:1 contrast ratio, IPS all-direction viewing

The IPS (In-Plane Switching) panel achieves 400 cd/m² luminance from the LED side-light backlight. At a contrast ratio of 1500:1 in Normally Black mode, black pixel luminance is below 0.27 cd/m², producing visually clean dark backgrounds on status screens and alarm dashboards. The 262K color depth (18-bit) covers sRGB adequately for UI rendering; color banding on smooth gradients is not present at this color depth for standard industrial UI palettes.

IPS technology maintains color shift below 10 delta-E at viewing angles up to 80° from normal in all planes. For a 4.3-inch panel at 400 nit, this means an operator standing to the side of a wall-mounted terminal reads the display without brightness rolloff or color inversion — a measurable difference from TN panels of the same size that typically begin shifting at 30–45° off-axis.

Physical dimensions: 60.00×104.25 mm outline, 2.6 mm depth, 45-pin FPC

The module outline is 60.00(H)×104.25(V)×2.6(D) mm. The active display area (56.16×93.55 mm) leaves a 1.92 mm border on the left and right edges and a 5.35 mm border at top and bottom, which accommodates a gasket or adhesive bead in panel-mount assemblies. The 2.6 mm maximum depth fits inside standard 3 mm to 4 mm deep LCD pockets without spacer modifications.

The pixel pitch is asymmetric: 0.039 mm horizontal and 0.117 mm vertical. This produces a display that is three times denser horizontally than vertically on a per-pitch basis, consistent with the 480×800 portrait aspect ratio (RGB Vertical Stripe arrangement). Effective PPI is approximately 218 horizontal and 218 vertical when calculated against the display area diagonal, since the actual pixel geometry is square at 0.117 mm on the longer axis of each sub-pixel group.

Operating temperature: −20 °C to +70 °C industrial range

The rated operating temperature of −20 °C to +70 °C covers industrial control cabinets, outdoor kiosk enclosures with passive thermal management, and vehicle cabin displays that must cold-start in winter ambient conditions. The Normally Black IPS configuration maintains stable contrast at low temperatures because NB IPS alignment is less susceptible to thermal-induced birefringence variation than NB TN panels.

Storage temperature extends to −30 °C / +80 °C. At the +70 °C operating upper limit, LED backlight luminance will decrease by approximately 10–15% relative to the 25 °C rated value due to LED junction temperature rise — this is within the expected range for side-light LED configurations and does not indicate degradation. If sustained operation above +60 °C is required, specify backlight drive current at the lower end of the rated range to reduce thermal load.

Target applications for 4.3-inch RGB interface IPS LCD modules

The combination of RGB 18-bit parallel interface, 480×800 portrait resolution, and IPS all-direction viewing makes this module applicable to:

• Industrial HMI panels on machines and process equipment requiring STM32 or i.MX-based control boards with LTDC output

• Medical portable instruments where 400 nit luminance provides readability under examination-room lighting without a high-power backlight driver

• POS terminals and handheld scanners where the 60 mm outline fits a standard 4.3-inch handset chassis

• Building automation controllers mounted on walls, viewed from angles up to 80° by personnel at different heights

• Automotive interior accessories (non-primary displays) operating within the −20 to +70 °C cabin temperature envelope

RGB 18-bit interface vs. SPI and MIPI DSI alternatives at 4.3 inches

At 4.3-inch size and 480×800 resolution, three interface options exist in this product class: SPI, RGB parallel, and MIPI DSI. SPI carries insufficient bandwidth for full-frame video at this resolution — a 480×800 frame over 8 MHz SPI requires approximately 460 ms per frame, limiting display updates to static or slowly changing content. MIPI DSI achieves the same bandwidth as RGB 18-bit in a 2-lane configuration, but requires a host with a MIPI D-PHY transmitter, which is available on i.MX8 and STM32MP1 but absent from most STM32F/H MCU families.

The RGB 18-bit parallel interface on the P043B030-V2 is the direct choice for STM32F4/F7/H7 LTDC-equipped designs because it requires no additional serialization IC, operates at standard CMOS voltage levels, and uses driver libraries that are part of the STM32 BSP HAL layer. Designs already targeting MIPI DSI processors should request the DSI variant of this panel family.

Procurement: part number, evaluation samples, and custom options

The ordering part number is P043B030-V2. Request this exact model string in quotation inquiries to avoid substitution with adjacent SKUs that share the 4.3-inch form factor but differ in interface (SPI vs. RGB) or driver IC (ST7701S vs. ILI6485). Samples for engineering evaluation are available before volume commitment; specify the intended host processor and interface voltage level (1.8 V or 3.3 V logic) when requesting samples so the correct FPC cable and evaluation adapter are included.

Custom configurations available on this platform include: capacitive touch panel overlay with I2C interface (GT911 or FT5x06 controller), optically bonded cover glass for outdoor readability, and extended operating temperature versions. Custom requests require a product specification review; lead time for custom configurations is 8–12 weeks from specification approval.

Integration notes: LTDC configuration, FPC routing, and backlight drive

On STM32 LTDC, configure the pixel clock between 25 MHz and 33 MHz, set HSYNC width to 10 clocks, VSYNC width to 4 lines, horizontal back porch to 20 clocks, and vertical back porch to 16 lines as a starting point — adjust to match the timing register values in the ST7701S initialization sequence provided by the panel datasheet. Use DE (Data Enable) mode rather than HV sync mode if the host LTDC supports it, as DE mode is more tolerant of timing margin variation between PCB revisions.

The 45-pin FPC connects to a 0.5 mm pitch ZIF connector on the host PCB. Route the 18 RGB data lines and clock as a matched-length group with less than 5 mm length mismatch within the group to avoid pixel jitter at 30 MHz DOTCLK. The LED backlight anode and cathode are on dedicated pins; drive the LED string with a constant-current driver set to the forward current specified in the datasheet. Dimming via PWM on the enable pin is supported down to 1 kHz without visible flicker.

📥 Download Datasheet (PDF)

FAQ

Q1. Which STM32 microcontrollers are directly compatible with the RGB 18-bit interface on the P043B030-V2?

A. Any STM32 device with an LTDC (LCD-TFT Display Controller) peripheral supports the RGB 18-bit parallel interface directly. This includes the STM32F429/469/479, STM32F746/756/769, STM32H743/750/757, and STM32H7B3. The STM32 BSP HAL includes an LTDC driver layer; configure the horizontal and vertical timing parameters to match the values in the ST7701S datasheet for this panel. STM32F1/F2/F3 series do not have LTDC and are not compatible with direct RGB interface connection.

Q2. Does the module include a touch panel, and what touch controller is supported?

A. The base P043B030-V2 module does not include a touch panel. Capacitive touch overlay options using GT911 (5-point, I2C) or FT5x06 (5-point, I2C) controllers are available as a configured variant. Resistive touch options are also available. Specify the touch type and controller preference when requesting samples or quotation, as the touch panel is factory-laminated and cannot be added in the field.

Q3. What is the pixel density and is text at small font sizes legible?

A. The display area is 56.16×93.55 mm at 480×800 pixels, which gives approximately 218 PPI. At this density, Latin characters at 10 pt (approximately 14 px height) are legible at 30 cm viewing distance without sub-pixel anti-aliasing. Chinese and Japanese characters at 12 pt and above render clearly. UI elements scaled for a 4.3-inch HMI screen at 218 PPI do not require custom font rendering beyond standard FreeType or STM32 TouchGFX font generation.

Q4. Can the backlight brightness be dimmed, and what is the minimum PWM frequency?

A. Yes. The LED backlight supports PWM dimming via the backlight enable pin. The minimum PWM frequency to avoid visible flicker at full-brightness settings is 1 kHz; at dimming levels below 30% duty cycle, 5 kHz or higher is recommended to prevent flicker perception under peripheral vision. Backlight brightness at 100% duty cycle corresponds to the rated 400 cd/m² luminance. Reducing duty cycle reduces luminance approximately linearly down to about 10% duty cycle, below which the LED forward voltage approaches the threshold and current becomes nonlinear.

Q5. What is the part number to order, and how are samples requested?

A. The ordering part number is P043B030-V2. To request engineering samples, contact the sales team and provide: the part number P043B030-V2, the target host processor and interface voltage level (1.8 V or 3.3 V), whether a touch panel variant is needed, and the target production volume and timeline. Sample lead time is typically 5–10 business days from order confirmation for standard in-stock configurations. For custom configurations (touch, bonding, extended temperature), samples follow a separate NRE process with 8–12 week lead time.