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PDF HV9910C Data sheet ( Hoja de datos )
| Número de pieza | HV9910C | |
| Descripción | Universal High-Brightness LED Driver | |
| Fabricantes | Microchip | |
| Logotipo |  |
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HV9910C
Universal High-Brightness LED Driver
Features
• Switch mode controller for single switch LED drivers
• Enhanced drop-in replacement to the HV9910B
• Open loop peak current controller
• Internal 15 to 450V linear regulator
• Constant frequency or constant off-time operation
• Linear and PWM dimming capability
• Requires few external components for operation
• Over-temperature protection
Applications
• DC/DC or AC/DC LED driver applications
• RGB back-lighting LED driver
• Back lighting of flat panel displays
• General purpose constant current source
• Signage and decorative LED lighting
• Chargers
Description
HV9910C 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 a 15 – 450V linear regulator which allows it
to work with a wide range of input voltages without the
need for an external low voltage supply. HV9910C
includes a TTL-compatible, 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 linear dimming of the LED current.
Unlike the HV9910B, the HV9910C is equipped with
built-in thermal-shutdown protection.
HV9910C is ideally suited for buck LED drivers. Since
the HV9910C operates in open-loop current mode con-
trol, the controller achieves good output current regula-
tion without the need for any loop compensation. Also,
being an open-loop controller, PWM-dimming
response is limited only by the rate of rise of the induc-
tor current, enabling a very fast rise and fall times of the
LED current. HV9910C requires only three external
components (apart from the power stage) to produce a
controlled LED current. This makes HV9910C an ideal
solution for low-cost LED drivers.
2014 Microchip Technology Inc.
DS20005323A-page 1
1 page  
HV9910C
TABLE 1-1: ELECTRICAL CHARACTERISTICS (CONTINUED) (SHEET 2 OF 2)1
Symbol Parameter
Note Min Typ Max Units Conditions
Current Sense Comparator
VCS
VOFFSET
Current sense pull-in thresh-
old voltage
Offset voltage for LD com-
parator
-
3
TBLANK
Current sense blanking
interval
-
-
tDELAY
Oscillator
Delay to output
-
225 250 275 mV -40°C < TA < +125°C
-12 - +12 mV
150 215 280
145 215 315
- 80 150
0 < TA < +85°C, VLD = VDD,
VCS = VCS,TH + 50mV after
ns
TBLANK
-40 < TA < +125°C, VLD = VDD,
VCS = VCS,TH + 50mV after
TBLANK
ns
VIN = 15V, VLD = 0.15,
VCS = 0 to 0.22V after tBLANK
fOSC
Oscillator frequency
Gate Driver
-
-
20
80
25
100
30
120
kHz
ROSC = 1.00MΩ
ROSC = 249kΩ
ISOURCE
Maximum GATE sourcing
current
- 0.165 -
-
A VGATE = 0V
ISINK
Maximum GATE sinking cur-
rent
-
0.165
-
-
A VGATE = VDD
tRISE
tFALL
GATE output rise time
GATE output fall time
4 - 30 50 ns CGATE = 500pF
4 - 30 50 ns CGATE = 500pF
Over-Temperature Protection
TSD
∆TSD
ISD
Shut-down temperature
Hysteresis
TSD-mode VIN current
- 128 - 150 °C
- 10 - 30 °C
- - - 350 μA
1 Specifications are TA = 25°C, VIN = 15V unless otherwise noted.
2 Also limited by package-power dissipation limit; Whichever is lower.
3 Applies over the full operating ambient temperature range of -40°C < TA < +125°C.
4 For design guidance only.
TABLE 1-2: THERMAL RESISTANCE
Package
8-Lead SOIC
16-Lead SOIC
8-Lead SOIC (with heat slug)
θja
101°C/W
83°C/W
84°C/W
2014 Microchip Technology Inc.
DS20005323A-page 5
5 Page 
HV9910C
FIGURE 4-1:
8-LEAD SOIC (NARROW BODY) PACKAGE OUTLINE (LG)
D
8
θ1
Note 1
(Index Area
D/2 x E1/2)
E1 E
L2 Gauge
Plane
1
Top View
A A2
A1
A
Seating
Plane
eb
Side View
A
Note 1
h
L
L1
θ
View B
h
Seating
Plane
View B
View A-A
Notes:
1. This chamfer feature is optional. A Pin 1 identifier must be located in the index area indicated. The Pin 1 identifier
can be: a molded mark/identifier; an embedded metal marker; or a printed indicator.
Symbol
A A1 A2 b D E E1 e h L L1 L2
Dimension MIN 1.35*
NOM -
(mm) MAX 1.75
0.10
-
0.25
1.25
-
1.65*
0.31
-
0.51
4.80* 5.80* 3.80*
4.90 6.00 3.90
5.00* 6.20* 4.00*
1.27
BSC
0.25
-
0.50
0.40
-
1.27
1.04
REF
0.25
BSC
JEDEC Registration MS-012, Variation AA, Issue E, Sep 2005.
* This dimension is not specified in the JEDEC drawing.
† This dimension differs from the JEDEC drawing.
Drawings not to scale.
θ
0°
-
8°
θ1
5°
-
15°
2014 Microchip Technology Inc.
DS20005323A-page 11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet HV9910C.PDF ] | |
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