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PDF HV9910B Data sheet ( Hoja de datos )
| Número de pieza | HV9910B | |
| Descripción | Universal High-Brightness LED Driver | |
| Fabricantes | Microchip | |
| Logotipo |  |
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HV9910B
Universal High-Brightness LED Driver
Features
• Switch mode controller for single switch LED drivers
• Enhanced drop-in replacement to the HV9910
• Open loop peak current controller
• Internal 8.0 to 450V linear regulator
• Constant frequency or constant off-time operation
• Linear and PWM dimming capability
• Requires few external components for operation
Applications
• DC/DC or AC/DC LED driver applications
• RGB backlighting LED driver
• Back lighting of flat panel displays
• General purpose constant current source
• Signage and decorative LED lighting
• Chargers
Description
HV9910B is an open loop, current mode control, LED
driver IC. This IC can be programmed to operate in
either a constant frequency or constant off-time mode.
It includes an 8.0 - 450V linear regulator which allows it
to work from a wide range of input voltages without the
need for an external low voltage supply. HV9910B
includes a PWM-dimming input that can accept an
external control signal with a duty ratio of 0 - 100% and
a frequency of up to a few kilohertz. It also includes a 0
- 250mV linear dimming input which can be used for lin-
ear dimming of the LED current.
HV9910B is ideally suited for buck LED drivers. Since
the HV9910B operates in open loop current mode con-
trol, the controller achieves good output current regula-
tion without the need for any loop compensation. PWM
dimming response is limited only by the rate of rise and
fall of the inductor current, enabling very fast rise and
fall times. HV9910B requires only three external com-
ponents, apart from the power stage, to produce a con-
trolled LED current. This makes HV9910B an ideal
solution for low cost LED drivers.
2015 Microchip Technology Inc.
DS20005344A-page 1
1 page  
HV9910B
2.0 PIN DESCRIPTION
The locations of the pins are listed in Package Type.
TABLE 2-1: PIN DESCRIPTION
Pin #
8-Lead SOIC 16-Lead SOIC
Function
Description
1 1 VIN Input of an 8.0 - 450V linear regulator.
Current sense pin used to sense the FET current by means of an
2
4
CS
external sense resistor. When this pin exceeds the lower of either
the internal 250mV or the voltage at the LD pin, the GATE output
goes low.
3
5
GND
Ground return for all internal circuitry. This pin must be electrically
connected to the ground of the power train.
4
8
GATE
Output GATE driver for an external N-channel power MOSFET.
PWM dimming input of the IC. When this pin is pulled to GND, the
5 9 PWMD GATE driver is turned off. When the pin is pulled high, the GATE
driver operates normally.
6
12
VDD
Power supply for all internal circuits.
It must be bypassed with a low ESR capacitor to GND (≥0.1μF).
7
13
LD
Linear dimming input and sets the current sense threshold as long
as the voltage at the pin is less than 250mV (typ).
Sets the oscillator frequency. When a resistor is connected
8
14
RT
between RT and GND, the HV9910B operates in constant fre-
quency mode. When the resistor is connected between RT and
GATE, the IC operates in constant off-time mode.
-
2, 3, 6, 7, 10,
11, 15, 16
NC No connection
2015 Microchip Technology Inc.
DS20005344A-page 5
5 Page 
HV9910B
16-Lead SOIC (Narrow Body) Package Outline (NG)
9.90x3.90mm body, 1.75mm height (max), 1.27mm pitch
D
16
θ1
Note 1
(Index Area
D/2 x E1/2)
1
Top View
A A2
A1
e
Side View
E1 E
A
Seating
Plane
b
A
L2 Gauge
Plane
L
L1
View B
h
h Note 1
Seating
θ Plane
View
B
View A-A
Note: For the most current package drawings, see the Microchip Packaging Specification at www.microchip.com/packaging.
Note:
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DPROGHGPDUNLGHQWL¿HU DQHPEHGGHGPHWDOPDUNHU RUDSULQWHGLQGLFDWRU
Symbol
A A1 A2 b D E E1 e h L L1 L2 ș ș
MIN 1.35* 0.10 1.25 0.31 9.80* 5.80* 3.80*
0.25 0.40
0O 5O
Dimension
(mm)
NOM
-
-
-
-
9.90
6.00
3.90
1.27
BSC
-
-
1.04 0.25
REF BSC
-
-
MAX 1.75 0.25 1.65* 0.51 10.00* 6.20* 4.00*
0.50 1.27
8O 15O
JEDEC Registration MS-012, Variation AC, Issue E, Sept. 2005.
7KLVGLPHQVLRQLVQRWVSHFL¿HGLQWKH-('(&GUDZLQJ
Drawings are not to scale.
2015 Microchip Technology Inc.
DS20005344A-page 11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet HV9910B.PDF ] | |
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