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| Part Number | Manufacturer | Description | ||||||
| 1. |  L4990A |
ST Microelectronics | PRIMARY CONTROLLER | 319.53 Kb | 24 Pg. | |||
| 2. | L4990AD |
ST Microelectronics | PRIMARY CONTROLLER | 319.53 Kb | 24 Pg. |
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| 1. |  87.45 Kb • 9 Pages |
Abstract: ... ) proposed (Fig 1) is a step down converter based on the L4990A, very fast current mode controller. A complete system solution is given and described. A connector with a standard VRM pinout is used ... Labels: L4990A, Application Notes |
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| 2. |  319.53 Kb • 24 Pages |
Abstract: ... L4990 L4990A. PRIMARY CONTROLLER. CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET (1A) FULLY LATCHED ... Labels: L4990A |
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| 3. |  71.13 Kb • 4 Pages |
Abstract: ... The L4990A introduces a delay, td ≅ 100ns, at turn-off, on the current loop, and due to this, the primary peak current value increases according to its slope. The consequence is that the regulated ... Labels: L4990A, Application Notes |
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| 4. |  115.97 Kb • 10 Pages |
Abstract: ... AN890. APPLICATION NOTE. 300W SECONDARY CONTROLLED TWO-SWITCH FORWARD CONVERTER WITH L4990A by: N.Tricomi C. Adragna. INTRODUCTION A typical off-line isolated switch-mode power sup-ply has ... Labels: L4990A, Application Notes |
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| 5. |  91.95 Kb • 11 Pages |
Abstract: ... to L4990A or L5991A UC3843A/B or UC3845A/B or L4981A. L4955V5.1. 100 μF. 1 3. 2. TRANSFORMER SPECS: CORE: E20x10x6, 3C85 material or equivalent 90.5 mm air gap for a primary inductance of 1.7 mH N1: 2 series ... Labels: L4990A, Application Notes |
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| 6. |  191.63 Kb • 11 Pages |
Abstract: ... to L4990A or L5991A UC3843A/B or UC3845A/B or L4981A. L4955V5.1. 100 μF. 1 3. 2. TRANSFORMER SPECS: CORE: E20x10x6, 3C85 material or equivalent ≈0.5 mm air gap for a primary inductance of 1.7 mH N1: 2 series ... Labels: L4990A, Application Notes |
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