Assuming standard LVPS application:
| Pin | Name | Typical Signal | Deep Function | |-----|------|----------------|----------------| | 1 | GND | Power ground | Reference for internal logic. Must be Kelvin-connected to source of external MOSFET. | | 2 | FB | 0.5V - 4.5V | Feedback from optocoupler. Voltage > 4.5V triggers OVP. Voltage < 0.5V triggers skip mode. | | 3 | CS | 0V - 1.0V | Current sense input. Internal threshold typically 0.7V. RC filter (1kΩ + 470pF) mandatory. | | 4 | VREF | 5.0V (or 2.5V) | Internal reference output. Decouple with 100nF to GND. | | 5 | B/O | 1.2V threshold | Brown-out. Resistor divider from bulk cap. If <1.2V, IC shuts down to prevent unstable operation. | | 6 | SS | 0V → 4V | Soft-start capacitor (1µF typical). Voltage rises slowly, limiting duty cycle. | | 7 | OUT | 0V / VCC | Gate drive for external N-channel MOSFET. Peak current ~500mA. Series resistor (10Ω–22Ω) recommended. | | 8 | HV | 320V DC | High-voltage startup current source (1mA typical). Drops to <100µA after startup. | | 9 | NC | Not connected | For isolation spacing. | | 10 | VCC | 12V – 20V | Supply voltage. UVLO (under-voltage lockout): ON at 16V, OFF at 8V. | | 11-16 | NC/Test | Usually GND or N/C | Factory test pins; tie to GND in most designs. |
Assuming a standard 4-pin RF amp:
The "brain" of the RM1-2316 relies on inputs from the DC Controller PCA. The schematic inputs generally include:
Below is a representative partial schematic of an RM1-2316-based flyback converter. Rm1-2316 Schematic
Primary Side:
AC Line → Bridge Rectifier → Bulk Capacitor (C1, 100µF/400V)
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+---> R_start (2x 150kΩ series) --> Pin 8 (HV)
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+---> R_brownout (1.2MΩ) --+--> Pin 5 (B/O)
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+--- R_brownout2 (100kΩ) ---+--- GND
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Pin 7 (OUT) --- R_gate (22Ω) ---+--- Gate of MOSFET (Q1, e.g., 4N60)
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Pin 3 (CS) --- R_sense (0.33Ω) ---+--- Source of MOSFET
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Pin 6 (SS) --- C_ss (1µF) --- GND
Secondary Side (feedback via optocoupler): Assuming standard LVPS application: | Pin | Name
+24V output --- R_divider_top (47kΩ) --+---> TL431 Ref
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GND --- R_divider_bottom (10kΩ) --------+
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TL431 Cathode --- Optocoupler LED (PC817) --- +24V via R_bias (1kΩ)
Optocoupler Transistor --- Pin 2 (FB) of RM1-2316
If the board is designed to pull power directly from the mains (AC input), the first stage of the schematic is a rectification circuit.
While the exact internal schematic of the Rm1-2316 module is proprietary, the external application schematic is well-documented in HP service manuals (e.g., HP 08593-90082). Let us reconstruct the key functional blocks based on published schematics. Secondary Side (feedback via optocoupler): +24V output ---
| Scenario | Action | |-------|--------| | You have the physical part | Perform continuity test, note pin-to-pin resistances, compare with PWM controller pinouts. Use a component analyzer if available. | | You only have the schematic marking | Assume it’s a custom-coded IC – for simulation, use a generic current-mode PWM model (e.g., UC3843) with same pin function mapping. | | You need a replacement | Do not sub blindly. Reverse-engineer the pin functions as shown above; then match to an off-the-shelf controller. |